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Chromium-free aluminum coating agent and preparation method thereof

An aluminum film, non-chromium technology, applied in the field of non-chromium aluminum film agent and its preparation, can solve problems such as restricting development and application, and achieve the effects of environmental friendliness, convenient use and excellent corrosion resistance

Pending Publication Date: 2021-12-28
马鞍山中顺佰斯予菲环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These disadvantages of traditional phosphating seriously restrict its further development and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment provides a non-chromium aluminum coating agent, based on the total weight of the non-chromium aluminum coating agent, the non-chromium aluminum coating agent includes: 30% by weight of phytic acid, 10% by weight of surfactant, tripolymer 10% by weight of sodium phosphate, 10% by weight of metal ion chelating agent, 10% by weight of silicoaluminum compound and 30% by weight of water.

[0026] Take a piece of galvanized steel sheet, first degrease the galvanized steel sheet with a degreasing agent, wash it with pure water, and dry it. Dilute the above-mentioned non-chromium aluminum film agent with water and apply it on the dried galvanized steel sheet, heat and dry , the amount of film is 0.30g / m 2 .

Embodiment 2

[0028] This embodiment provides a non-chrome aluminum film agent, based on the total weight of the non-chrome aluminum film agent, the non-chrome aluminum film agent comprises: 20% by weight of phytic acid, 10% by weight of surfactant, tripolymer 15% by weight of sodium phosphate, 16% by weight of metal ion chelating agent, 19% by weight of silicoaluminum compound and 20% by weight of water.

[0029] Take a piece of galvanized steel sheet, first degrease the galvanized steel sheet with a degreasing agent, wash it with pure water, and dry it. Dilute the above-mentioned non-chromium aluminum film agent with water and apply it on the dried galvanized steel sheet, heat and dry , the amount of film is 0.20g / m 2 .

Embodiment 3

[0031] This embodiment provides a non-chrome aluminum film agent, based on the total weight of the non-chrome aluminum film agent, the non-chrome aluminum film agent comprises: 40% by weight of phytic acid, 15% by weight of surfactant, terpolymer 15% by weight of sodium phosphate, 10% by weight of a metal ion chelating agent, 10% by weight of a silicon-aluminum compound, and 10% by weight of water.

[0032] Take a piece of galvanized steel sheet, first degrease the galvanized steel sheet with a degreasing agent, wash it with pure water, and dry it. Dilute the above-mentioned non-chromium aluminum film agent with water and apply it on the dried galvanized steel sheet, heat and dry , the amount of film is 0.26g / m 2 .

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PUM

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Abstract

The invention belongs to the technical field of surface treatment, and discloses a chromium-free aluminum coating agent and a preparation method thereof. Based on the total weight of the non-chromium aluminum coating agent, the non-chromium aluminum coating agent comprises the following components in percentage by weight: 20-40% of phytic acid, 1-20% of a surfactant, 1-20% of sodium tripolyphosphate, 1-20% of a metal ion chelating agent, 1-20% of a silicon-aluminum compound and 10-40% of water. The non-chromium aluminum coating agent does not contain phosphorus, is environment-friendly, is convenient to use, and is beneficial to reducing the cost.

Description

technical field [0001] The invention belongs to the technical field of surface treatment, and in particular relates to a non-chromium aluminum coating agent and a preparation method thereof. Background technique [0002] The coating agent is to produce a phosphate film on the metal surface, and then form a dense protective film. The film agent is beneficial to protect the metal, isolate it from air oxidation, and improve the adhesion with the paint powder. [0003] After the metal material is phosphated by the coating agent, the adhesion between the metal substrate and the coating can be enhanced, and the corrosion resistance can be improved. Although phosphating treatment has many advantages, there are also many disadvantages that cannot be overcome by itself: the phosphating treatment solution contains harmful substances such as phosphate and heavy metals, and more or less sludge and harmful gases will be generated during the treatment process. , affecting the normal pro...

Claims

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Application Information

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IPC IPC(8): C23C22/20
CPCC23C22/20
Inventor 张宛谊
Owner 马鞍山中顺佰斯予菲环保科技有限公司
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