Updated Monday, December 1st, 12:00 P.M. New York time  --   Save This Page (del.icio.us)

The finishingcom Hotline:
Serious education plus the most fun you can have in metal finishing
 
legend:

( ) = Date in parentheses is date of most recent response

= No one has answered yet

= Comments may raise blood pressure

= The inquiry has photos / graphics

= Tops in information-richness

= For readers with a sense of humor only

= Page contains an embedded video

Have a shop problem or a finishing need?

This page contains Technical inquiries; please avoid commerciality.
For Commercial inquiries, please see our Looking for a Jobshop page, and Looking for Products & Services page.

0. Corrosion. Compatibility, Choosing a Finish

Preparation:

1a. Mechanical Prep

1b. Pretreatments

1c. Masking & Racking

Inorganic Finishing:

2a. Anodizing & Light Metals

2b. Electroplating & Electroforming

2c. Electroless Plating

2d. PVD, CVD, Vacuum Processes

2e. Galvanizing, Hot Dipping

2f. Black Oxide, Bluing, Coloring

2g. Other Inorganic Finishing Processes

Organic Finishing:

3a. Electropainting, Autophoretic

3b. Powder Coating

3c. Lacquers, Clearcoats

3d. Painting, Adhesives And Other Organic Coatings

Post-treatments:

4a. Chemical Post-treatments

4b. Baking & Non-chemical Post-treatments

4c. Stripping, Reworks, etc.

Supporting Issues:

5a. Analysis, Lab Technique, QA/QC

5b. Wastewater, Pollution

5c. Safety, Emissions, Toxicity

5d. Plant & Process Engineering

5e. Software, Specs, Books, Stats

5f. World Wide Word Of The Week

5g. RoHS, E-O-L, etc.

5h. Mostly metallurgy

6a. Hobbyists, Enthusiasts, Artists

6b. Research, Thesis work

6c. K-12 Science Projects, Elementary to High School

0. CORROSION, COMPATIBILITY, CHOOSING A FINISH . . .

50607. Rust proof coating [India] (November 28)
50605. Comparison of 440C with SS 321 for valves for steam service [India] (November 28)
50590. Suitability of Cr Plating on SGI base metal for Sea Water application [India] (November 26)
50585. Pipe Ramming Sleeve. Protection of the steel casing [Ireland] (November 26)
50534. Molded or formed plastic needs a good mirror finish [California] (November 21)
50508. Customs officer says 400 series is not stainless steel [India] (November 20)
50096. SS304L above seawater environment (November 20)
50507. Nickel plating vs. e-coating? [Massachusetts] (November 14)
50506. Silver Plating or Coating a timber beam [Greece] (November 14)
50479. Copper Heat Exchanger Corrosion [Canada] (November 14)
50476. What is the better finish specification for steel close to the sea? [UAE] (November 10)
50449. Will anodized stainless steel seize with another stainless steel part ? [Canada] (November 7)
50462. Pencil Hardness failure issue on abs finish [California] (November 7)
50432. What is the allowable extent of magnetism in CF8m castings? [India] (November 6)
50355. Does gold induce galvanic coupling in a copper etching system? [California] (November 6)
50392. What is most cost efficient at resisting corrosion on steel surfaces? [China] (October 31)
50389. Material for handling 80~95% Sulfuric Acid @ 280~320C and 1atm [Taiwan] (October 31)
50380. Reducing the friction coefficient of stainless steel on steel [Israel] (October 30)
50348. Champagne gold stainless steel [Philippines] (October 28)
50329. Teflon coating vs. hard chrome plating ? [Saudi Arabia] (October 28)
50365. Is SS304 is a good cost cutting solution for SS316 ? [India] (October 27)
50349. Salt fog protection for different types of plating [Malaysia] (October 23)

1. PREPARATION . . .

1a. MECHANICAL PREP
[GRINDING, POLISHING, VIBRATORY FINISHING, BUFFING, HONING]


50505. Removing snap ring burr on an interrupted cut on work hardened spline [Michigan] (November 26)
50535. Quantifying the effectiveness of scale removal [Michigan] (November 26)
50575. Shot blasting to a SA-2-1/2 surface [India] (November 24)
50205. Vibratory finishing Steel, Stainless, Steel and Aluminum [New York] (November 11)

1b. PRETREATMENTS
[PICKLING, PASSIVATION, PHOSPHATIZING, CLEANING, ELECTROPOLISHING, ACTIVATION]


50525. 17-4 forging rust on un machined surface [Georgia] (November 26)
50524. Are there alternatives to passivation? [Illinois] (November 26)
50502. Passivation of 316 Stainless - Bath required? [California] (November 26)
50461. Is phosphate coating making our springs squeak? [Texas] (November 25)
50554. In A967 passivation, does the 25% by vol. Nitric represent industrial (65%) or full strength Nitric? [Mississippi] (November 24)
50576. Inhibitor for stainless steel pickling? [Malaysia] (November 24)
50573. Using ammonia in pickling solution [Iran] (November 24)
50562. Electropolishing Problem [New Jersey] (November 24)
50504. Help = 5 stage Pre-Cleaner / Phosphate coating for Powder paint system [Massachusetts] (November 21)
50503. Electrolytical removal of low alloyed steel plate [Sweden] (November 14)
50430. Etching mild steel tubing for good adhesion of urethane coating [Wisconsin] (November 13)
50417. Change in frictional properties after passivation [Texas] (November 11)
50460. Citric Acid Passivation Problems [Australia] (November 11)
50459. What chemicals will remove black stains on steel at weld areas? [Turkey] (November 7)
50418. What does iron phosphate do to hot dip galvanized steel [Florida] (November 6)
50431. Zinc Phosphate - Lubricity [Michigan] (November 4)
50419. Zinc Phosphate Nubbing on Clean vs. Coated Racks [Michigan] (October 31)
50390. Chemicals for brightening of ss components? [India] (October 31)
50379. Passivation for Stainless 318 [Israel] (October 30)
50350. Seeking Opinion on Anodic and Cathodic cycles involved with Cleaning and Material activation [Ohio] (October 27)
50328. Salt spray on SS 416 [India] (October 24)
50347. Please describe Zinc Phosphating to someone familiar with anodizing [Kentucky] (October 23)

1c. MASKING, RACKING, TAPING, PLUGGING, PHOTOSENSITIVE MASKS


50279. Substitute for MEK in Gunwash? (October 30)
50182. Masking of caliper in bore area for brake application [India] (October 10)

2. INORGANIC FINISHING PROCESSES . . .

2a. ANODIZING AND LIGHT METAL TREATMENTS


50600. How to prevent micro-flaking of cast aluminum 383? [Oregon] (November 28)
50592. Spots on Alu extrusion from PVC protection tape [Singapore] (November 28)
50568. HARD ANODIZING COATING THICKNESS NOT BUILDING UP [India] (November 28)
50566. Titanium chemistry in HF and HNO3 chemical milling [New York] (November 26)
50552. Seal issue with nickel fluoride and hot flashed part [Michigan] (November 24)
50551. Digital printing on anodized aluminum [Canada] (November 24)
50561. Crazing problem on welded assemblies made from 5052 H32 aluminum [California] (November 24)
50553. Anodizing and molding [Pennsylvania] (November 21)
50478. Green Aluminum Oxide Powder on a supposedly anodized component [Illinois] (November 18)
50446. Eliminate bulk anodize burns/voids [California] (November 18)
50484. ALUMINIUM ANODIZING FAILURE [Italy] (November 13)
50448. Coating on etched aluminum foil [New York] (November 7)
50447. Anyone seen this aluminum anodizing defect? [Michigan] (November 7)
50414. TSA OR BSAA INSTEAD OF CAA, CONVERSION COATING [Turkey] (November 6)
50429. Threaded steel rod, zinc plated with trivalent chromate screwed into aluminum plate [Massachusetts] (November 4)
50393. Abrasion resistance of type 3 vs type 2 anodizing [Utah] (November 3)
50416. Boric Sulfuric Electrolyte Analysis [New York] (October 31)
50415. Purpose of Zinc Bath [Alabama] (October 31)
50378. Titanium and stainless anodizing process information [Pakistan] (October 30)
50346. Passivating Heat Treated Titanium [Canada] (October 30)
50265. Corrosion and pitting during pre-anodize clean and etch on 7075-T7351? (October 24)
50282. Etching bath and procedure for titanium tubing (October 21)
50316. Alternative material for 6061-T6 [India] (October 21)

2b. ELECTROPLATING and ELECTROFORMING


50610. Excessive decarburization due to zinc plating and baking [Minnesota] (November 28)
50606. Urgent Solution Needed for Chroming failure. Chrome specs suspected [Florida] (November 28)
50596. Want consistent 2-tone plating on acid tin [India] (November 28)
50458. pH drop in Nickel Sulphamate installation [Portugal] (November 26)
50584. Converting rhodium dip plating solution for use in pen plating [India] (November 26)
50518. Acid zinc barrel inconsistent blue chromate [New Zealand] (November 26)
50061. Mixing sodium di-chromate in passivation [Montana] (November 26)
50582. Trivalent Yellow passivation failing in 13-20 hrs salt spray [India] (November 26)
50523. Can we do decorative chrome from our hard chrome tank? [Tennessee] (November 25)
50567. Appearance issue on zinc-nickel plated parts (heat treated parts) [Indonesia] (November 24)
50564. Delayed Blisters in Alkaline Zinc Electroplating [Michigan] (November 24)
50560. Corrosion resistance of Hard Chrome at pH 1 [South Africa] (November 21)
50559. Corrosion Resistant Plating for Cold Rolled Steel [California] (November 21)
50550. We plate copper on Zammak, what changes are needed to plate on iron [Pakistan] (November 21)
50529. Erosion of the zinc passivated surface in storage [India] (November 19)
50443. Peeling problem in nickel-chrome plating [Canada] (November 18)
50501. Bronze Finish is rusting and flaking [UAE] (November 14)
50445. Tin plating testing points [India] (November 13)
50412. BLISTERS IN PLATING 8740 MATERIAL WITH CADMIUM (AMS-QQ-P-416 TY.II CL.2) [California] (November 13)
50004. Plating to meet 1000 hours of salt spray [India] (November 13)
50444. Implications of adding selective Gold over Stainless Steel 301-1/2 hard [Mexico] (November 11)
50442. Formulation of copper strike/plating bath for stop off of nitriding [Canada] (November 11)
50440. Problem in Nickel Chrome Plating [India] (November 11)
50439. Brush Plating Titanium?? [California] (November 11)
50212. HARD CHROMIUM FAILURE (November 11)
50413. Plating on Molybdenum [California] (November 10)
50411. Pulse Plating for Palladium? [Texas] (November 10)
50396. Help with carbonate build up in Albaloy bath [Massachusetts] (November 10)
50441. Chrome Plating of Striped Cylinder Liner [India] (November 7)
50457. Removal Of Thin Stroke Ni Electroforms [Florida] (November 7)
50382. Cadmium plating adhesion problem on 15-5 PH [India] (November 3)
50376. Galling on Rotating Stainless Flanges [Tennessee] (November 3)
50373. Problem of hardchrome plating not depositiing on weld joints [India] (October 31)
50384. Chromate passivation solution is stripping the cadmium plating [Ireland] (October 31)
50377. Non Cyanide Plating on Zinc Die Cast (Zinc Alloy) [Thailand] (October 30)
50375. What is proper Rhodium Plating Thickness and how to measure it? [India] (October 30)
50374. Proper equipment for wheel and rim chroming? [South Africa] (October 30)
50202. Black spots in Zinc Trivalent Plating [India] (October 30)
50312. Techni-White, Albaloy, Miralloy, Optalloy, White Bronze, copper/tin/zinc alloy plating and Salt Fog test per ASTM B117 [Massachusetts] (October 28)
50138. To reduce the failure of Zinc Plating Components [India] (October 28)
49928. How to get lower hardness of sulfamate plated nickel? (October 28)
50354. Chrome on aluminium without zincate [Isle of Man] (October 27)
50324. Roughness in copper plating bath [India] (October 27)
50325. Problem in tin plating [India] (October 24)
50353. GOLD PLATING INSIDE WAVEGUIDES [UK] (October 24)
50326. Nickel sulphate bath pores [Turkey] (October 23)
50323. Zinc Nickel Plating [India] (October 23)
50322. CHROME SCRATCH REPAIR [New Jersey] (October 23)
50313. Trivalent Zn Black Peels off [India] (October 23)
50291. Speckles problem in acid tin plating (October 23)
50243. Black conductive plating (October 23)
50345. Want a Dupli-cell for zinc-iron plating [Costa Rica] (October 23)
50327. Can blue passivation pass nsst for 72 no WR? [Malaysia] (October 21)
50292. Satin gold bath content composition [India] (October 21)
50141. Electroplating of stainless steel mesh with platinum [South Africa] (October 21)
49562. Troubleshooting Hard Chrome Plating [India] (October 21)
50315. Black zinc plating doesn't stick to stainless steel [Singapore] (October 21)
50314. Black chromate turns khaki green (military green) after two weeks [India] (October 21)

2c. ELECTROLESS PLATING, PLATING ON PLASTICS, IMMERSION PLATING


50609. Passivation of electroless nickel -- theory and practice [Argentina] (November 28)
50594. Electroless Nickel Poor Finish on S7 Tool Steel [Kansas] (November 28)
50593. How to plate copper on paint [Singapore] (November 28)
50219. Impossibility of building up more than 10 microns of electroless nickel [Portugal] (November 18)
50475. Effect of citric acid on a electroless nickel plated surface [Portugal] (November 13)
50352. Disintegration of silver paint in satin gold bath [India] (November 3)
50368. Nickel-Phosphorus plating [Israel] (October 30)
50369. Plated layer (Cu-Ni-Cr)cracking [Vietnam] (October 27)
50311. Electroless Copper Plating for Micro-probing Transistors [Texas] (October 23)

2d. PVD, CVD, ION IMPLANTATION, VACUUM PROCESSES


50604. Tell me about Aluminium Sputtering [India] (November 28)
50514. Can I use Cvd system for metallizing and tiN COATING? [India] (November 26)
50175. Gold plating over low percentage of gold alloy [Indonesia] (November 18)

2e. GALVANIZING, ALUMINIZING, HOT TIN DIPPING


50612. Galvanising Ash Generation Benchmarking [Mexico] (November 28)
50601. Can I use EGI sheets for outdoor applications? [India] (November 28)
50321. Fluxing after hot dip [Germany] (November 21)
50474. Is anodizing of galvanised sheet steel possible (PGI) [Australia] (November 10)
50473. Soldering of galvanized versus galvannealed metal [North Carolina] (November 10)
50428. How to make Galvanizing Flux? [India] (November 4)
50387. Adding ammonium chloride in powder form to surface of hot-dip bath and it's effects on the environment and humans [Australia] (November 3)
50410. What kind of galvanizing for a hollow metal door [Puerto Rico] (November 3)
50409. Galvanising tank material [Nepal] (November 3)

2f. BLACK OXIDE, BLUING, COLORING, PATINATING


50402. Hot Black Oxide on Copper [Colorado] (October 31)
50310. Stainless Steel....Black Oxide Finish [Massachusetts] (October 20)

2g. OTHER INORGANIC FINISHING PROCESSES
[PORCELAIN, FLAME SPRAY, HVOF, MECHANICAL PLATING]


50231. Alternative to Magni coating [India] (November 14)
50194. How to differentiate two parts having Dacromet and Geomet coating? [India] (October 23)

3. ORGANIC FINISHING PROCESSES . . .

3a. ELECTROPAINT PRIMING, AUTOPHORETIC COATINGS


50438. Trouble shooting for electroplating [Malaysia] (November 25)
50528. New plant having some problems with CED electrocoating [India] (November 19)
50427. Do's and Dont's for new E coat paint shop [India] (November 4)

3b. POWDER COATING


50611. Best acid dip for powder coating [Maine] (November 28)
50558. Corrosion on sharp edges metal parts with polyester powder coating [Malaysia] (November 28)
50583. How to deliberately accelerate crazing and cracking problems of powder paint [Turkey] (November 26)
50557. IR Oven creating dirt in powder coating process [Canada] (November 21)
50530. We are powder coating aluminum sheet, but paint is peeling off [India] (November 21)
50408. Painting a cast aluminum product to the best quality finish [Colorado] (November 3)
50364. Phosphating before painting [Turkey] (October 24)
50344. Punching holes in powder coated sheetmetal [New Hampshire] (October 23)

3c. LACQUERS, CLEAR COATS, ELECTROPHORETIC TINTING, ANTI-TARNISH


50039. E-coatings, are they toxic? [UK] (October 27)
50053. E-coating material [India] (October 1)

3d. PAINTING, ADHESIVES AND OTHER ORGANIC COATINGS


50527. Apartment complex asks about proper repainting of old galvanized doors [Pennsylvania] (November 21)
50483. Painting screws in large volumes. How is it done? [Canada] (November 13)

4. POST-TREATMENTS

4a. CHEMICAL POST-TREATMENTS
[CHROMATE CONVERSION COATINGS, RUST PREVENTATIVES]


50499. Use of copper sulfate to protect metal [Texas] (November 28)
50589. Marbleized blackening effect on copper [Texas] (November 26)
50263. Need procedure for Yellow Passivation on Zinc [India] (November 11)
50472. Clear coat for high polish brass? [Wisconsin] (November 10)
50426. Deflashing chemicals for leadframes? [Philippines] (November 4)

4b. BAKING AND NON-CHEMICAL POST-TREATMENTS:
[HYDROGEN EMBRITTLEMENT AND DE-EMBRITTLEMENT, ANNEALING, WHISKERS, SOLDERING, REFLOWING]


50549. Is there danger of hydrogen embrittlement from acidic passivation of titanium? [Israel] (November 26)
50571. Welding problems on plated terminals [Mexico] (November 24)
50521. Immersion silver tarnish issue after wave reflow in RoHS environment [Malaysia] (November 17)
50363. Why does the hot dipped tin coated copper wire blackens @ 155 C ? [India] (November 3)
50400. Does Zinc Plating on 17 HRC steel need hydrogen embrittlement relief? [India] (November 3)
50320. Hydrogen Embrittlement of 1144 stressproof [Nebraska] (October 30)

4c. STRIPPING, REWORKS, ETC.


50512. Trying to strip chrome nickel and copper from a thousand car wheels a week [Florida] (November 26)
49899. Home made chrome stripper/chrome activator [Cyprus] (November 18)
50471. Removed screen paint from plastic HDBE crates with sulfuric acid [India] (November 10)

5. SUPPORTING ISSUES

5a. ANALYSIS, LAB TECHNIQUE, Q.A.


50603. How to chemically determine Na + and K+ in salts? [Egypt] (November 28)
50569. Interpreting salt spray results on e-coated zinc plating [South Africa] (November 24)
50132. Salt Spray Woes.... Please help [New Jersey] (November 20)
50470. Sodium Bicarbonate Analysis [New York] (November 11)
50463. HCL titration analysis [Texas] (November 11)
50343. Standards for crosshatch loss for aluminum boats [Missouri] (October 24)
50309. Testing procedure for phosphate accelerator [Pakistan] (October 20)

5b. WASTE & WASTEWATER TREATMENT, POLLUTION CONTROL


50581. How to treat spent Nickel solution containing Nitrobenzene Sulfonate [Malaysia] (November 28)
50307. H2O2 and biological wastewater treatment [Germany] (November 18)
50038. How to prep new resin for DI service? [Indonesia] (November 18)
50498. Re-Use of Spent Sulfuric Acid. [India] (November 14)
50308. Is environmental experience a good start for a plating career? [South Carolina] (November 6)
50284. Water recycling question (November 6)
50425. Silica removal by anion exchanger [Iran] (November 4)

5c. SAFETY ISSUES, EMISSIONS, TOXICITY


13796. Toxic Fumes from Guanidine Thiocyanate (November 6)
50424. Anodizing, is it food safe? [Canada] (November 4)

5d. PLANT & PROCESS ENGINEERING, CONSTRUCTION


50386. Suggested Tank Lining for 98% Sulfuric Acid? [UAE] (November 28)
50556. Copper Size for DC low-voltage high-amperage [Malaysia] (November 26)
50497. Order Entry Software for Metal Finishing [Georgia] (November 14)
50423. Cooling system for hard anodizing [Indonesia] (November 10)
50394. Need oven to burn sweeps [Florida] (October 31)

5e. QUESTIONS ABOUT SOFTWARE, SPECS, BOOKS, INDUSTRY STATISTICS, ETC.


50495. ASTEC QP4412? [Delaware] (November 18)
50477. Questions about military finishing spec. MIL-STD-171? [Florida] (November 14)
50496. How to keep up with revised Specifications? [Michigan] (November 14)
50306. Need help for finishing: what is ELp-Fe/Ni (92)-P10/AT [Malaysia] (October 20)

5f. WORLD WIDE WORD OF THE WEEK
[LINGO, TRADE NAMES, TRANSLATIONS]


50494. What does MFCr3 mean? [Malaysia] (November 13)
50422. Need AgC Plating Literature please [India] (November 4)
50381. ISO 1320:1192 an active or inactive standard [Mississippi] (October 31)
50362. What is Nigresene coating? [Singapore] (October 24)
50342. What is Pewter finish [Canada] (October 22)
50341. What is Sweet blasting? [UAE] (October 22)

5g. CHROMATE REPLACEMENT & THE EUROPEAN END-OF-LIFE DIRECTIVE; Cd, Ni, Pb, Cr REPLACEMENTS.


50548. Thermal conductivity of chromate conversion coating [North Carolina] (November 24)
50437. Is Trivalent Chrome Passivation and Electrolytic Process? [Turkey] (November 10)

5h. MOSTLY METALLURGY


50226. Difference between Stainless Steel grade 304 and 202 [New York] (November 14)
50130. Determining max. temp SS304 experienced from its Blue color? (October 8)

6a. ARTISTS, HOBBYISTS, CAR BUFFS, HOME OWNERS, ETC.


50599. Flatware is claimed as 18/8 but not so marked [Connecticut] (November 28)
50597. Artist seeking to recreate natural rich dark brown brass patina [UK] (November 28)
50588. How can you tell if a screw or nail is galvanized or zinc coated? [Oregon] (November 26)
50580. Is nickel plating or tin plating better for a wine press? [Canada] (November 25)
50579. Mixed bleach with phosphoric acid and inhaled it [Kentucky] (November 25)
50555. Can I use a PC power supply for anodizing? [Michigan] (November 24)
50572. Mismatched Stainless Kitchen Appliances [Louisiana] (November 24)
50570. Lacquering Nickel and Brass [North Carolina] (November 24)
50531. Best coating for black exhaust tips? [Wyoming] (November 21)
50547. Stainless steel street rod uses aluminum rivets. What now? [Pennsylvania] (November 21)
50520. Turquoise Collector, was given 250 lbs. of Silver Ore from 92 yr. old miner's Wife. [Arizona] (November 21)
50129. Bathtub gets Blue/Green stains (November 20)
50533. Need chrome dipping (not electroplating) equipment [Canada] (November 19)
50421. Patinating copper plating [Massachusetts] (November 18)
50080. Why is copper roof brown, not green? [Washington] (November 18)
50526. Avoiding corrosion from stainless cleat on aluminum "tinnie" [Australia] (November 17)
50522. Using steel plate on a bar table [California] (November 17)
50516. How to produce titanium-like finish on stainless steel [Indiana] (November 17)
50515. Aluminium etching question [South Africa] (November 17)
50511. Nambe metal bowl has dark stain [Iowa] (November 14)
50455. Restoring the dark brown finish to copper sinks [Texas] (November 14)
50493. Need rusty steel sheets for book covers [New York] (November 13)
50492. Vertical soldering 24 gauge bonderized box rain gutter. [California] (November 13)
50488. How to build a "hot tank" for metal cleaning? [Canada] (November 13)
50435. Removing hot dip zinc coating from wash tub [Alabama] (November 13)
50406. Stainless only tools for finishing SS - how critical [Virginia] (November 11)
50468. Automotive use of Stainless Steel Fasteners in Aluminum Block [New Zealand] (November 10)
50407. Honda ST1300 motorcycles thermostat failure [Georgia] (November 10)
50456. Allergic to White Gold engagement ring, what to do? [Canada] (November 7)
50454. Why are car wheels made of steel? [India] (November 7)
50401. Need Help With Paint for Refrigerator Door Handle (November 6)
50436. Electroplating tin on copper [Pakistan] (November 5)
50372. Is a galvanized steel tub ok for my dogs to drink out of? [Idaho] (November 3)
50255. Brass-plated lamp is rusted (November 3)
50361. Artist seeks technical advice on plating project [California] (October 31)
50360. Removing Gold Electroplating from a 22-lb Bolt [Iowa] (October 31)
50395. Forcing Chrome to Tarnish [New York] (October 31)
50388. Teflon paint removal --non chemical immersion type solution needed [California] (October 31)
50371. Need to cover a non-food counter top for sales counter in retail [Alabama] (October 30)
50190. Chemicals for grey-bluing (not blacking) early Winchester and Marlin barrels. (October 28)
50367. Why does Baking Soda Blasting prevent rust? [Belgium] (October 28)
50333. Painting and Distressing a Tin Tile Mirror [New York] (October 27)
50258. Powder coating without baking (October 27)
50359. Possible to plate a textile sculpture? [Ohio] (October 24)
50358. Trying to satisfy a client wanting a patina copper bar front [Ireland] (October 24)
50304. Galvanized pipe for fryer filter [Delaware] (October 24)
50339. Chroming equipment for my motor cycles [Scotland] (October 23)
50337. Replacing wheels. How are aftermarket wheels? [Rhode Island] (October 23)
50335. Repair nickel-plated finish scratches [Kentucky] (October 23)
50002. How to clean Brass sign? (October 23)
50340. Tarnished Baldwin candlestick lamps need help! [South Carolina] (October 22)
50338. Corrosion in new digital camera [UK] (October 22)
50336. Removing orange tint from Teak [California] (October 22)
50334. Clear coat mosiac in bottom of clay birdbath [Michigan] (October 22)

6b. RESEARCH, THESIS TOPICS, UNIVERSITY & POST-GRAD STUDENTS


50163. Electroless gold plating [Switzerland] (December 1)
50536. Removing scratches from lexan drive-thru windows [Illinois] (November 28)
50578. Electroplating steel components with copper [Pakistan] (November 25)
50404. Colour of electroless NiB bath and stability [India] (November 18)
50010. How to achieve large pores at titanium surface [Michigan] (November 18)
50158. Transferring Hull cell analysis to plating bath? [Ireland] (November 14)
50397. Help seeking research literature review sources regarding chrome plating acceptability [Ohio] (November 14)
50420. How would you finish a composite field hockey stick? [UK] (November 4)
50405. High emissivity, high temperature resistant coating for surface temperature measurement using IR-pyrometer [Germany] (October 31)
50385. Yellow Iridite for aluminum parts to be painted [Florida] (October 31)
50332. What is the current status of theoretical understanding of hard chrome plating [Greece] (October 30)
50357. Hydrogen embrittlement in quenched steel [Argentina] (October 28)

6c. K-12 SCIENCE PROJECTS, GRAMMAR & HIGH SCHOOL STUDENT QUESTIONS


50197. WHY DOES BATTERY ACID DISSOLVE METALS BUT NOT PLASTICS? (November 28)
50532. Science project: Hydrochloric acid affect on different metals. [Michigan] (November 19)
50517. Anodizing and alodizing [Australia] (November 17)
50467. How to determine the composition of a coin [Canada] (November 10)

More Letters?

© finishing.com, inc., 1990-2008
finishing.com Home Page