Chromate-treated zinc-plated steel strip and method for making

Chemistry: electrical and wave energy – Processes and products

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

204 351, 204 41, 204 561, C25D 706, C25D 1138

Patent

active

049023870

ABSTRACT:
A chromate-treated steel strip comprising a chromate film on a zinc plated steel strip is improved in corrosion resistance and coating adherence by forming the chromate film of three layer structure consisting of a metallic Cr layer, a Cr.sup.3+ oxide layer, and an outermost surface layer of SiO.sub.2, and Cr.sup.3+ oxide plus Cr.sup.6+ oxide. The three layered chromate film is deposited on a zinc plated steel strip by effecting cathodic electrolysis in a bath containing hexavalent chromium, colloidal silica, optional alumina sol, and a fluoride, by supplying electricity at a specific current density to a controlled quantity.

REFERENCES:
patent: 4137132 (1979-01-01), Ward et al.
patent: 4437944 (1984-03-01), Bruno et al.
patent: 4548868 (1985-10-01), Yohezawa et al.
patent: 4659394 (1987-04-01), Hara et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Chromate-treated zinc-plated steel strip and method for making does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Chromate-treated zinc-plated steel strip and method for making, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chromate-treated zinc-plated steel strip and method for making will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1614426

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.