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 12201

Zinc phosphatizing and the embrittlement problem


 

We are in the business of manufacturing disc spring made out of spring steel. As surface coating we do Zinc phosphating on the spring. we would like to know weather hydrogen embrittlement is required for this process. If so, please give us the details for the hydrogen embrittlement process to be carried out.

Haridas Raghavan Nair
- Thane, Maharashtra, India


 

Hydrogen embrittlement takes place because before zinc plating when spring are put for pickling, hydrogen from acid gets entrapped on surface and zinc plating thus chances of failure of component increases. To avoid these failure go for least amount of time in pickling, moreover go for acid baths in zinc plating maintaining ph b/w 4 to 6 , don't go for cyanide baths, & in zinc plating. If it is possible go for drum/barrel rather hanging components in tanks.

Vikas Kaushal
- Chandigarh India


 

We encounter no problems by using springs made of hot dip galvanised steel wire and we also apply zinc-phosphating. Perhaps this is an alternative. In the end, it gives a better overall corrosion protection.

Best regards,

Peter Piessens
- Bertem, Belgium



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.