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Oil removal method for metal part

A metal parts, alkaline degreasing technology, applied in the direction of using liquid cleaning methods, chemical instruments and methods, cleaning methods and utensils, etc., can solve the problems of easily damaged metal parts, unsatisfactory electroplating effect, etc. The effect of reducing adhesion and promoting separation

Pending Publication Date: 2021-04-27
深圳市山水乐环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional degreasing process generally adopts the method of chemical degreasing, and uses the hot alkali solution to saponify and emulsify the oil to remove the oil on the surface of the metal parts. This process is easy to damage the metal parts, and it is prone to the problem of unsatisfactory electroplating effect.

Method used

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  • Oil removal method for metal part
  • Oil removal method for metal part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The metal parts made of carbon steel provided by Xiongxin Electroplating Factory are degreased before electroplating. The method is as follows:

[0044] (1) Rinse the metal parts for 3 minutes with clear water with a flow rate of 0.75m / s to obtain the first water-washed metal parts;

[0045] (2) Submerge the first water-washed metal piece in an alkaline degreasing solution with a mass concentration of 20g / L, and rotate it at a rate of 16r / min for 8min at 40°C to obtain an alkaline-washed metal piece, wherein the alkaline degreasing The raw material of the agent is "Steel Chemical Degreasing Powder HSY-307" purchased from Shenzhen Hongshengyuan Technology Co., Ltd.;

[0046] (3) Submerge the alkali-washed metal piece in an aqueous hydrochloric acid solution with a mass concentration of 10%, and rotate it for 3 minutes at a rate of 16 r / min to obtain the pickled metal piece;

[0047] (4) Use the pickling metal parts as the cathode, the electro-galvanized sheet as the ano...

Embodiment 2

[0052] The metal parts made of carbon steel provided by Xiongxin Electroplating Factory are degreased before electroplating. The method is as follows:

[0053] (1) Rinse the metal piece with clear water of 0.75m / s for 4 minutes to obtain the first water-washed metal piece;

[0054] (2) Submerge the first water-washed metal piece in an alkaline degreasing solution with a mass concentration of 25g / L, and rotate it at a rate of 17r / min for 9min at 45°C to obtain an alkaline-washed metal piece, wherein the alkaline degreasing The raw material of the solution is "Steel Chemical Degreasing Powder HSY-307" purchased from Shenzhen Hongshengyuan Technology Co., Ltd.;

[0055] (3) Submerge the alkali-washed metal piece in an aqueous hydrochloric acid solution with a mass concentration of 12%, and rotate it for 4 minutes at a rate of 17 r / min to obtain the pickled metal piece;

[0056] (4) Use the pickled metal parts as the cathode, use the electro-galvanized sheet as the anode, and car...

Embodiment 3

[0061] The metal parts made of carbon steel provided by Xiongxin Electroplating Factory are degreased before electroplating. The method is as follows:

[0062] (1) Rinse the metal parts for 3-5min with clear water with a flow rate of 0.75m / s to obtain the first water-washed metal parts;

[0063] (2) Submerge the first water-washed metal piece in an alkaline degreasing solution with a mass concentration of 30g / L, and rotate it at a rate of 18r / min for 10min at 50°C to obtain an alkaline-washed metal piece, wherein the alkaline degreasing The raw material of the solution is "Steel Chemical Degreasing Powder HSY-307" purchased from Shenzhen Hongshengyuan Technology Co., Ltd.;

[0064] (3) Submerge the alkali-washed metal piece in an aqueous hydrochloric acid solution with a mass concentration of 15%, and rotate it for 5 minutes at a rate of 18 r / min to obtain the pickled metal piece;

[0065] (4) Use the pickling metal parts as the cathode, the electro-galvanized sheet as the an...

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Abstract

The invention provides an oil removal method for a metal part, and belongs to the technical field of heavy oil treatment. According to the oil removal method, dust impurities stained on the surface of the metal part are removed through first water washing, oil stains on the surface of the metal part are preliminarily removed through alkali washing, and an oxide layer on the surface of the metal part is removed through acid washing; the oil stains on the surface of the metal part are further removed through electrolysis due to the fact that the adhesive force of an oil film and the metal part is reduced under the electrolysis condition, and the oil stains are easy to peel off; and meanwhile, under the electrochemical action, a large amount of gas can be separated out from the surfaces of a cathode and an anode, small bubbles can be adsorbed on the surface of the oil film, and the bubbles tear the oil film into small oil drops and bring the small oil drops to the liquid level along with increase of the bubbles and increase of buoyancy, so that the oil stains are thoroughly removed. The oil removal method is easy to operate, the heavy oil removal effect is good, the metal part is not damaged, and the subsequent electroplating process of the metal part is facilitated.

Description

technical field [0001] The invention relates to the technical field of heavy oil treatment, in particular to a method for removing oil from metal parts. Background technique [0002] Metal products that require surface treatment for electroplating are often stained and form a layer of heavy oil film due to various treatments, including mechanical processing. During electroplating, this layer of oil film isolates the metal from the plating solution, which affects the deposition of metal ions. In severe cases, the metal coating cannot be formed on the surface, or causes peeling and foaming. At the same time, it will pollute the electrolyte after being brought into the plating tank, affecting the electroplating process. , causing quality problems, so the degreasing process in the electroplating industry is an indispensable and important link in the pre-plating treatment process. [0003] The traditional degreasing process generally adopts the method of chemical degreasing, usi...

Claims

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Application Information

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IPC IPC(8): C23G1/02C23G1/14C25F1/04B08B3/04
CPCC23G1/02C23G1/14C25F1/04B08B3/04
Inventor 程学勤王晓虎叶平吴光军程伟甘雨
Owner 深圳市山水乐环保科技有限公司
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