Compound cleaning method for hot dip steel member

A technology of steel parts and hot-dip plating, applied in the field of metal product manufacturing

Inactive Publication Date: 2005-08-17
HEBEI UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of existing cleaning methods, the present invention solves

Method used

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  • Compound cleaning method for hot dip steel member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Cleaning sample: cold-drawn steel wire with a diameter of 4.0 mm. The dirt on it consists of: iron oxide scale, phosphating film and grease;

[0016] Cleaning conditions: put 2 / 3 height of composite cleaning solution in the cleaning tank of 400W ultrasonic machine, the energy level density of cleaning solution is 60 watts / liter, the ratio of composite cleaning solution is: 30% concentration of hydrochloric acid 10%, additives 5%, the balance is water; the additive ratio is OP-10:6501:Pingpingjia=1:1:1.5, the weight percent concentration is 10%; the temperature of the cleaning solution is 30°C.

[0017] Cleaning results: within 3 seconds, the surface dirt of the plated parts can be completely removed at one time; after the plated parts are directly hot-dip galvanized, there is no phenomenon of missing plating.

Embodiment 2

[0019] Cleaning sample: hot-rolled steel strip, the dirt on it is mainly composed of thick oxide scale.

[0020] Cleaning conditions: energy level density of the cleaning solution: 70 watts / liter; cleaning solution ratio: hydrochloric acid (concentration: 30%) 15%, additive 8%, balance water; additive concentration 12%; cleaning solution temperature 45°C. The rest are the same as embodiment 1.

[0021] Cleaning result: within 18 seconds, the dirt on the surface of the plated parts can be completely removed at one time, and hot-dip galvanizing can be performed directly, and there is no missing plating on the plated parts.

Embodiment 3

[0023] Cleaning sample: hot-rolled steel strip, the dirt on it is mainly composed of thick oxide scale.

[0024] Cleaning conditions: energy level density of cleaning liquid: 100 watts / liter; cleaning liquid ratio: hydrochloric acid (concentration 30%) 20%, additive 10%, balance water; additive concentration 15%; cleaning liquid temperature 50°C . The rest are the same as embodiment 1.

[0025] Cleaning result: within 8 seconds, the dirt on the surface of the plated parts can be completely removed at one time, and hot-dip galvanizing can be performed directly, and there is no missing plating on the plated parts.

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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...

Claims

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Application Information

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IPC IPC(8): B08B3/12C23C2/06C23G1/08C23G1/36
Inventor 曹晓明温鸣申晓刚郝春亮
Owner HEBEI UNIV OF TECH
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