Anticorrosive overlap-coated steel material

Details Anticorrosive overlap-coated steel material Anticorrosive overlap-coated steel material

1978-10-06

1980-02-26

Tufariello, T. M.

Chemistry: electrical and wave energy

Processes and products

204 40, 428632, 428648, 428659, 428935, C25D 510, C25D 548, C25D 526

Patent

active

041905040

ABSTRACT:
An anticorrosive overlapped coating so far practiced as applied to such iron and steel materials as plates, pipes, bars or wires is formed by electroplating an iron or steel material on the surface with an Sn base - Zn alloy layer and applying a chromate-treatment on it. However, this requires such long time in forming a plated layer thickness that a reduction of the plating time together with a further improvement of the anticorrosion is hoped for today. The present invention has succeeded in making it possible to reduce the plating time while improving the anticorrosion and in improving the productivity by forming an electroplated layer of an Sn base - Zn alloy directly or through an electroplated layer of Zn on the surface of a steel material, then forming an electroplated layer of Zn on the electroplated layer of said alloy and further applying a chromate-treatment on said Zn layer.

REFERENCES:
patent: 3857684 (1974-12-01), Kubu
patent: 3986843 (1976-10-01), Adaniya
patent: 4048381 (1977-09-01), Adaniya
patent: 4064320 (1977-12-01), Adaniya

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