Corrosion protection process
AssigneeUnilever Home & Personal Care USA, Division of Conopco, Inc.
InventorsMichael John Bowyer, Stephen Kelly, John Stewart
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Abstract
A process for the protection of stainless surface from corrosion by a hypohalite-containing composition, the process comprising:- (a) contacting the surface with a composition comprising hydrogen peroxide; and (b) contacting the surface with the hypohalite-containing composition.
Claims8
A process for the protection of stainless surface from corrosion by a hypohalite-containing composition, the process comprising:
- (a) contacting the surface with a composition comprising hydrogen peroxide;
- and
- (b) contacting the surface with the hypohalite-containing composition.
A composition according to any preceding claim, wherein the hypohalite-containing composition further comprises an alkali metal silicate.
A process according to any preceding claim, wherein the hydrogen peroxide composition comprises from 0.1% to 8-10%, preferably from 1% to 5% by weight of hydrogen peroxide.
Use of a hydrogen peroxide solution to passivate a stainless steel surface, prior to exposure of the surface to a composition containing an alkali metal hypochlorite.
Dependencies are inferred from the claim text.