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Phosphatization liquid for unvarnished iron pipes of window guardrails

A technology of phosphating solution and guardrail, applied in the direction of metal material coating process, etc., can solve the problems of slow fusion speed, affecting environmental quality, harsh operating environment, etc., and achieve the effect of increasing current density, accelerating growth speed, and expanding cathode range.

Inactive Publication Date: 2014-12-24
无锡市锡山区鹅湖镇荡口青荡金属制品厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The quality of the pre-treatment of the sandblasting process affects the adhesion, appearance, moisture resistance and corrosion resistance of the coating. If the pre-treatment is not done well, the rust will continue to spread under the coating, making the coating Layers fall off
For phosphating treatment on the surface of steel, the traditional phosphating solution has high temperature, high energy consumption, long treatment time, and high cost. Especially for the treatment of iron pipes for window guardrails, etc., usually self-employed or For small and medium-sized enterprises to operate this kind of business, if high-temperature phosphating is used, it is indeed difficult for some small and medium-sized enterprises.
However, even if the normal temperature phosphating solution is used, most of them still need a certain temperature, the fusion speed is slow, and the operating environment is harsh. During use, toxic gases or sediments will be generated, which will affect the environmental quality.
In recent years, there are also reports on the normal temperature phosphating solution in the market, but the treatment time is too long during use, and its acidic substances corrode the steel surface greatly, and if it is not serious, it will affect the phosphating quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A kind of phosphating solution before iron pipe painting for window guardrail, the composition of this phosphating solution is: zinc oxide 20g / L; Manganese dihydrogen phosphate 19g / L; 85% phosphoric acid 40g / L; Hydroquinone 20g / L ; tartaric acid 6g / L; citric acid 6g / L; nickel nitrate 1g / L; sodium fluoride 3g / L; sodium nitrite 1g / L; sodium chlorate 2g / L; the balance is water.

Embodiment 2

[0014] A kind of phosphating solution before iron pipe painting for window guardrail, the composition of this phosphating solution is: zinc oxide 24g / L; Manganese dihydrogen phosphate 15g / L; 85% phosphoric acid 44g / L; Hydroquinone 14g / L ; tartaric acid 10g / L; citric acid 2g / L; nickel nitrate 2g / L; sodium fluoride 1g / L; sodium nitrite 3g / L; sodium chlorate 1g / L; the balance is water.

Embodiment 3

[0016] A kind of phosphating solution before iron pipe painting for window guardrail, the composition of this phosphating solution is: Zinc oxide 21g / L; Manganese dihydrogen phosphate 18g / L; 85% phosphoric acid 41g / L; Hydroquinone 18g / L ; tartaric acid 7g / L; citric acid 5g / L; nickel nitrate 1.3g / L; sodium fluoride 2.5g / L; sodium nitrite 1.3g / L; sodium chlorate 1.7g / L; the balance is water.

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PUM

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Abstract

The invention discloses a p hosphatization liquid for unvarnished iron pipes of window guardrails. The phosphatization liquid comprises 20-24 g / L of zinc oxide, 15-19 g / L of manganous dihydrogen phosphate, 40-44 g / L of phosphoric acid with the concentration of 85%, 14-20 g / L of hydroquinone, 6-10 g / L of tartaric acid, 2-6 g / L of citric acid, 1-2 g / L of nickel nitrate, 1-3 g / L of sodium fluoride, 1-3 g / L of sodium nitrite, 1-2 g / L of sodium chlorate, and the balance water.

Description

technical field [0001] The invention relates to the technical field of surface treatment, in particular to a phosphating solution for iron pipes used for window guardrails before painting. Background technique [0002] As we all know, ordinary steel is easy to generate a kind of loose rust in the atmosphere due to various impurities, which will intensify the corrosion of the substrate. Previously, it was treated chemically or electrochemically to form a dense and continuous phosphating film on the metal surface, laying a good foundation for further painting and other treatments of the metal. [0003] At present, the pretreatment commonly used in the market is sandblasting technology and phosphating solution mainly suitable for steel, and the phosphating solution includes bathing solution and replenishing solution. The pre-treatment stage of the sandblasting process refers to the treatment that should be carried out on the surface of the workpiece before it is sprayed and sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/07
Inventor 钱永清
Owner 无锡市锡山区鹅湖镇荡口青荡金属制品厂
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