finishing.com -- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing

HomeFAQsBooksHelpWantedAdvertiseForum
topic 11724

White spots on bright nickel finish


 

DEAR SIR

I'M INQUIRING THE POSSIBLE CAUSE OF THE WHITE SPOTS I FOUND ON MY PIECES. WE DO BRIGHT NICKEL FINISH OF SMALL PIECES (LIKE EYELETS) ON 2 FULLY AUTOMATIC BARREL GALVANIC LINES, AND IN SOME LOADS WE FOUND VERY MAKED WHITE SPOTS. WHEN THAT HAPPENS I CLOSE THE GALVANIC FOR THE WHOLE DAY AND IN THE NEXT DAY IT'S BACK IN NORMAL AGAIN. THE PROBLEM ARISES 2 OR 3 TIMES A WEEK. IF I DON'T CLOSE THE LINE THE NEXT CHARGES CAME NORMAL THAT AGAIN WITH WHITE SPOTS. SOME TIMES 30% OF PRODUCTION BECOMES DAMAGED. ANY SUGGESTION?

BEST REGARDS,

Ricardo Mota
- Vila Nova de Famalicˇo, Portugal


 

I would need more information to establish what changes when the plant is switched off for the day: does the solution temperature come back to optimum? Does the rectifier cool off and work normal again? Do you have busbars overheating? Are the white spots the size of the barrel perforation? Is the iron contamination content checked and kept under control? Sorry! Only questions but they might point you to the solution of your problem!

All the best,

trudy kastner
Trudy Kastner
electroplating service
Durban, KZN, South Africa




This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Q or A to THIS thread START a NEW THREADView This Week's HOT TOPICS

Disclaimer: It's not possible to 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 may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices


©1995-2017 finishing.com     -    Privacy Policy
How Google uses data when you visit this site.