PRODUCTION OF ZINC-NICKEL ALLOY ELECTROPLATED MEMBER

Title:

PRODUCTION OF ZINC-NICKEL ALLOY ELECTROPLATED MEMBER

Document Type and Number:

Japanese Patent JP3890149

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To prevent the rusting of the non-plated part and to exclude clogging, etc., when used for a pipeline, etc., by treating a zinc-nickel alloy electroplated member having the non-plated part with a chromating soln., admixed with a specified amt. of nickel.
SOLUTION: A zinc-nickel alloy electroplating film is formed on an electroplated member such as an industrial steel pipe having a non-plated part such as the inner periphery, and the member is then dipped in a chromating soln. and chromated to obtain a zinc-nickel alloy electroplated member. In this case, Ni is added by 3-600 ppm, preferably 5-300 ppm, as nickel ion Ni2+ is added to the chromating soln. consisting essentially of chromium (VI) ion and such an inorg. acid as sulfuric acid and hydrochloric acid. Consequently, the rusting of the non-plated part of the member is prevented when chromated, the clogging, etc., due to rusting are avoided, and the member is appropriately used.

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Inventors:

Nittami Arata

Application Number:

JP25067398A

Publication Date:

March 07, 2007

Filing Date:

September 04, 1998

Export Citation:

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