Home /
T.O.C.
FAQs
 
Good
Books
Ref.
Libr.
Advertise
Here
Help
Wanted
Current
Q&A's
Search 🔍
the Site
pub Where the world gathers for
plating, anodizing, & finishing Q&As since 1989







-----

Phosphating


2001

Dear Reader :

I am manufacturing phosphating chemicals (I started this as a hobby). I use phosphoric acid with zinc oxide and little nickel nitrate with sodium nitrate. This in a hot bath does not work. Can anyone guide me?

Regards,

Harish Chitkara
- Chennai, India



2002

Try sodium nitrite as an accelerator rather than sodium nitrate.

Ron Zeeman
Continuous Colour Coat - Brampton, ON, CAN



2000

Can anyone suggest material sources for Class 4 phosphating as per DOD-P-16232 [ed. note: replaced by MIL-DTL-16232 [affil. link or from DLA] ]?

Aryeh Asher
- Ashkelon, Israel



2000

Can you put your specifications in detail? Based on your requirement we can suggest for the chemical or the process.

DR.D.SEN
- calcutta, INDIA



2000

Dr. Aryeh Asher,

You might give Ted a wrong impression that there are no suppliers in your country....-:)

sara michaeli
sara michaeli signature
Sara Michaeli
Tel-Aviv-Yafo, Israel



2000

Country? I thought Israel was a city.
(only joshing, folks)

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey



2006

Which is the best phosphating method for powder coated product? hot or cold.

K.L.Nemade
irrigation systems - Jalgaon, M.S. INDIA



2007

The best is usually the most difficult and most expensive, K.L. Zinc phosphate with a final chrome rinse is probably the 'best'.

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey



2007

I want to know the right pretreatment & powder coating process for metal irrigation water filters AS these filters will be always in contact with water & soil may have some contact with fertilisers ( specially in case of fertiliser tanks ) & of course always in open sunlight & mounted in the farm itself for paint durability & resistance to corrosion ,protection against weathering effect ?

I have already done experiments of existing seven tank pretreatments ? & various ( epoxy & pure polyester & hybrids )

if someone know specific way of coating of water filters & fertiliser tanks pl. tell me.

V.R.PATIL
irrigation systems - Jalgaon, MS, India



2002

We buy some spherical plain bearings from market & dealers give different brands according to availability. Japanese makes looks deep black colour, local makes are light grey. Catalogues say only phosphated. What is better? Black oxide also acceptable? Please clarify.

Regards,

S M Sundaram
- Tamilnadu, India



2002

Hi, go for manganese phosphate it blackish in colour and secondly it is recommended for the parts where some lubrication is required eg: bearings, pinnion etc. Grey finish is of zinc phosphate and zinc phosphate looks grey in colour.

Qutubuddin Saify
- U.A.E.



2002

Dear Mr Saify,

Thanks for the reply. Would you suggest the cycle time for Mn Phosphating, because it is eating the material, or should we have to keep stock considering erosion. Pl advise for bearing steel material SAE52100, High Carbon High Chromium steel erosion pattern

Regards,

S MEENAKSHI SUNDARAM
- Chennai, Tamilnadu, India



2002

Mn phos time should be 10 mins. The imported bearings are not Mn Phos, they get the dark tone on account of different heat treatment process.

Khozem Vahaanwala
Khozem Vahaanwala
Saify Ind
supporting advertiser
Bengaluru, Karnataka, India
saify logo



2004

Dear Mr. Sundaram,

Keep the bath pointage around 30 35 ml, control iron to minimum and immerse the component when temp is 95 C and above for 10 min.

Prabhakar Gupta
- Kanpur, U.P., India


none
finishing.com is made possible by ...
this text gets replaced with bannerText
spacer gets replaced with bannerImages

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories:

 
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g, Train'g
& Software


About/Contact    -    Privacy Policy    -    ©1995-2023 finishing.com, Pine Beach, New Jersey, USA