Compound cleaning method for hot dip steel member

Abstract

The composite cleaning process for hot plated steel part includes pouring the composite cleaning liquid into ultrasonic cleaning tank for filling 2 / 3 of the tank, selecting the ultrasonic generator power in the power density of 50-100 W / L in the cleaning liquid, setting the workpiece to be cleaned inside the composite cleaning liquid at 25-50 deg.c, and ultrasonic cleaning for 3-20 sec. The composite cleaning liquid consists of 30 % concentration hydrochloric acid solution 7-20 wt%, additive 5-10 wt% and water the rest. The additive consists of surfactant comprising OP-10, 6501 and peregal in the weight ratio of 1 to 1 to 1.5 and water, and has concentration of 12-20 wt%. The present invention can complete the surface cleaning of hot plated steel part in one step, and has the advantages of simple process, low cost, stable quality, less pollution and being suitable for industrial production.

Description

technical field

[0001] The invention relates to metal product manufacturing technology in the metallurgical industry, specifically a metal product coating process technology, especially a composite cleaning method for hot-dip steel parts. The international patent main classification number is proposed to be Int.C1 7 .C25D 3 / 22. Background technique

[0002] In order to prevent steel parts and their products, such as steel wire, steel pipe, steel plate, steel strip; steel structure parts; standard bolts and nails; hardware tools, malleable steel parts, etc., from corrosion in the atmosphere, surface protection treatment, such as hot-dip plating Zinc, tin, aluminum and other metals, or hot-dip other alloys, such as zinc and aluminum alloys. In the hot-dip plating process of these steel parts, the surface cleaning treatment of the steel parts must be carried out to remove the dirt on the surface and ensure the quality of the hot-dip products. The surface dirt of steel parts m...

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