Patent
Composite electroplated steel sheet and its production
TLDR
In this article, a composite plated steel sheet having excellent resistance to corrosion was produced by using composite plating liquid prepd. by adsorbing a specific amt. of Na 2+, etc.Abstract:
PURPOSE: To produce a composite plated steel sheet having excellent resistance to corrosion by using a composite plating liquid prepd. by adsorbing a specific amt. of Na 2+ , etc. on oxide particles of SiO 2 , etc. having a specific grain size, charging electrostatically positive the particles and dispersing the same in a specifically composed zinc alloy plating bath in plating the steel sheet. CONSTITUTION: A material prepd. by adsorbing one or ≥2 kinds among Ni 2+ , Fe 2+ and Co 2+ at ≥2mg for each 1g on a mixture composed of one or ≥2 kinds among SiO 2 , TiO 2 , ZrO 2 , Nb 2 O 5 , Ta 2 O 5 , Al 2 O 3 having 1W100μm grain size and charging electrostatically positive the mixture is dispersed at 10W150g/l into a zinc alloy plating bath contg. 10W100g/l Zn 2+ and 5W70g/l in total of one or ≥2 kinds among Ni 2+ , Fe 2+ and Co 2+ and the pH thereof is adjusted to 1W4, by which a composite plating bath is prepd. A steel sheet is electroplated by using such composite plating bath, by which the composite electroplated steel sheet having the much improved corrosion resistance is obtd. COPYRIGHT: (C)1985,JPO&Japioread more
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Patent
Zinc-plated metallic material
Kazuhiko Mori,Shinji Nomura +1 more
TL;DR: A zinc-plated metallic material resistant to corrosion at elevated temperatures comprising a metallic material; a plating layer consisting of zinc or zinc alloy containing 70% by weight or more of zinc; and a coating layer on the plating, comprising 10 to 5,000 mg. of magnesium oxide or hydrated magnesium oxide and 50 to 5k mg of chromium oxide per square meter of the coating layer.
Patent
Metallic surface treating method
TL;DR: In this paper, the problem of applying galvanizing or galvannealing on a metallic material and thereafter to produce a protective film on this plating is solved by executing electrolysis with a galvanizing and galvanizing bath contg. at least one kind selected from the group of iron, cobalt, nickel, tervalent chromium, copper, manganese, aluminum and tin.
Patent
Composite electroplated steel sheet having high corrosion resistance
TL;DR: In this article, a Zn-alloy plating layer is formed on one or both faces of a composite electroplated steel sheet by using a plating bath prepd. by adding the hardly soluble chromate such as BaCrO4 into Zn alloy plating, and further mixing >= 1 kinds of alumina sol and Ni ions therewith.
Patent
Composite zinc-silica electro-galvanized steel sheet excellent in corrosion resistance
TL;DR: A composite zinc-silica electro-galvanized steel sheet excellent in corrosion resistance, having on at least one surface thereof a zinciferous plating layer, preferably in an amount of from 5 to 100 g/m² per side thereof, into which silica particles are dispersed.
Patent
Surface treated steel material particularly electroplated steel sheet
TL;DR: In the electroplated steel sheets for automobile use, the chipping resistance, water-resistant adhesion, unpainted corrosion resistance, post-painted corrosion resistance and resistance to secular exposure are improved by superimposing a chemical conversion layer between electro-plated layers of zinc and iron, nickel, cobalt, or alloys thereof.
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