Metal finishers helping each other -- No cost, No registration, No damn popups
(we earn from 'affiliate link' purchases, making the site possible)

Curated with aloha by
Ted Mooney, P.E. RET

finishing.com -- The Home Page of the Finishing Industry

  The authoritative public forum
  for Metal Finishing 1989-2025

Thread 433/00

Supplementary coating on Zinc Blue passivation

Hello

Can anybody help me? We have sheet metal parts which are Zinc Blue passivated.We need to provide a supplementary coating to increase the resistance to corrosion. One of the suggestions is to use Molybde num Phosphate coating.Unfortunately this is not easily available in India. Can anyone suggest an alternative supplementary coating.

BHUDEB MUKHERJEE
Electronic Equipment Mfgr. - Bangalore, KARNATAKA, INDIA
2006
publicly reply to BHUDEB MUKHERJEE

2007

Hello

To increase corrosion you can go for good Trivalent chromate available in the market.Other wise you can use sealant to increase the corrosion with your existing chromate whether Tri Or Hex type. Contact plating chemical manufacturer or supplier.

P. Gurumoorthi
electroplating process chemicals - Chennai, Tamilnadu, India
publicly reply to P. Gurumoorthi

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

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: