Corporate standard for galvanized wire

(1) Subject content and scope of application

This standard specifies the technical requirements, test methods and inspection rules for hot dip galvanizing of steel.

This standard is applicable to steel structures made of carbon structural steel, steel pipe assembly pipes, welded or welded pipe fittings, hot-dip galvanized layers of containers and batch-processed steel parts and similar products. The steel pipe is galvanized and anti-corrosive.

(2) Reference standards

GB470 "Zinc ingot"

GB534 "Industrial Sulfuric Acid, Industrial Hydrochloric Acid, Industrial Chlorination"

GB/2 343―84 "General Procedure for Hot Dip Galvanizing"

GB/T 13912―93 Metal covering, technical requirements for hot-dip galvanizing of steel products

GB/T 3019-92 galvanized welded steel pipe for low pressure fluid transportation

(3) Technical requirements

Material

A, zinc ingot: should not be lower than the No. 1 zinc specified in GB470.

B. Sulfuric acid: It should meet the first grade concentrated sulfuric acid specified in GB534.

C. Hydrochloric acid: It should meet the first-grade concentrated hydrochloric acid specified in GB534.

D. Chemical conversion: It should meet the primary chlorination according to GB2946.

2. Appearance

A. The surface of the coating is continuous and practical and smooth.

B. The installation and combination of the plated parts are not allowed to sag, drip or slag.

C. The surface of the plated parts shall be free of defects such as leakage plating and exposed iron, but the defects are allowed in the following cases.

a. The plating area is a spot having a diameter of 0.5 mm or less.

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