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Non-chrome composite passivation solution for surface of galvanized steel sheet part of pump

A technology of galvanized steel plate and passivation solution, which is applied in the coating process of metal materials, etc., which can solve the problems of cumbersome operation, loose film layer, and unsightly color

Inactive Publication Date: 2017-12-01
ANHUI TENGLONG PUMP VALVE MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the disadvantages of inorganic protection are that the film layer is loose, the anti-corrosion performance is insufficient, there are also problems such as long time, and the color is not beautiful; the disadvantages of organic protection are that it is easy to change the size of the workpiece, the quality is not good, and the operation is cumbersome, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A chromium-free composite passivation solution for the surface of galvanized steel sheet parts of pumps, which is composed of the following parts by weight: 28 parts of molybdate, 13 parts of tungstate, 8 parts of zirconate, and 5 parts of tannic acid , 4 parts of phytic acid, 2 parts of potassium permanganate, 6 parts of passivation aids, 1000 parts of water; described passivation aids are made up of the following parts by weight: 5 parts of ethylenediaminetetraacetic acid, 14 parts of alcohol Acid resin, 3 parts of diethylene glycol ether, 4 parts of benzotriazole, 6 parts of hydroxyethylene diphosphonic acid, 2 parts of cerium chloride, 5 parts of methyltriethoxysilane.

[0014] Further, described molybdate is sodium molybdate

[0015] Further, the tungstate is cobalt tungstate.

[0016] Further, the zirconate is potassium zirconate.

[0017] Further, the pH value of the composite passivation solution is 2.5 to 3.5.

Embodiment 2

[0019] A chromium-free composite passivation solution for the surface of galvanized steel sheet parts of pumps, which is composed of the following parts by weight: 30 parts of molybdate, 15 parts of tungstate, 10 parts of zirconate, and 7 parts of tannic acid , 6 parts of phytic acid, 3 parts of potassium permanganate, 7 parts of passivation aids, 1100 parts of water; described passivation aids are made up of the following parts by weight: 7 parts of ethylenediaminetetraacetic acid, 16 parts of alcohol Acid resin, 4 parts of diethylene glycol ethyl ether, 5 parts of benzotriazole, 7 parts of hydroxyethylene diphosphonic acid, 4 parts of cerium chloride, 7 parts of methyltriethoxysilane.

[0020] Further, the molybdate is composed of sodium molybdate and potassium molybdate.

[0021] Further, the tungstate is composed of sodium tungstate and ferrous tungstate.

[0022] Further, the zirconate is composed of potassium zirconate and sodium zirconate.

[0023] Further, the pH val...

Embodiment 3

[0025] A chromium-free composite passivation solution for the surface of galvanized steel sheet parts of pumps, which is composed of the following parts by weight: 32 parts of molybdate, 16 parts of tungstate, 12 parts of zirconate, and 8 parts of tannic acid , 7 parts of phytic acid, 4 parts of potassium permanganate, 8 parts of passivation aids, 1200 parts of water; described passivation aids are made up of the following parts by weight: 8 parts of ethylenediaminetetraacetic acid, 17 parts of alcohol Acid resin, 5 parts of diethylene glycol ether, 6 parts of benzotriazole, 8 parts of hydroxyethylene diphosphonic acid, 5 parts of cerium chloride, 8 parts of methyltriethoxysilane.

[0026] Further, the molybdate is composed of sodium molybdate, potassium molybdate and calcium molybdate.

[0027] Further, the tungstate is composed of sodium tungstate, cobalt tungstate and ferrous tungstate.

[0028] Further, the zirconate is composed of potassium zirconate and sodium zirconate...

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PUM

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Abstract

The invention discloses a non-chrome composite passivation solution for the surface of a galvanized steel sheet part of a pump, and relates to the technical field of metal surface processing. The non-chrome composite passivation solution is composed of molybdate, tungstate, zirconate, tannic acid, phytic acid, potassium permanganate, a passivation assistant and water. According to the finally obtained non-chrome composite passivation solution, the safety is good, pollution is small, the requirements for green development of modern enterprises are met, in addition, the quality of a processed workpiece surface is high, the performance of a passivating film is excellent, the processing and producing efficiency is high, and high market competitiveness is achieved.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to a chromium-free composite passivation solution on the surface of galvanized steel sheet parts for pumps. Background technique [0002] Zinc is an important non-ferrous metal. Electrogalvanizing is an effective way to improve the corrosion resistance of steel. It is widely used in aviation, transportation, electric power, ships, machinery and other fields. In the processing and manufacturing of the pump, most parts such as the casing, flange, base, and reinforcing ribs are processed and manufactured from steel plates, and are usually treated with an electro-galvanized layer for protection. In a dry and clean atmosphere, the corrosion rate of zinc is very small, but it is easy to corrode when used in a humid environment. Therefore, the zinc coating needs to be passivated. Chromate passivation treatment is usually carried out, but due to its high toxicity and carcin...

Claims

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Application Information

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IPC IPC(8): C23C22/42C25D5/48
CPCC23C22/42C23C2222/20C25D5/48
Inventor 徐向远
Owner ANHUI TENGLONG PUMP VALVE MFG CO LTD
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