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Quick environment-friendly phosphorus-free phosphating solution

A phosphating solution and an environment-friendly technology, applied in the field of phosphating solution, can solve problems such as phosphorus emission restriction, and achieve the effect of convenient preparation

Active Publication Date: 2012-12-05
ANHUI QIMING SURFACE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The traditional phosphating treatment process in the metal surface treatment industry is subject to increasingly strict restrictions on phosphorus emissions

Method used

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  • Quick environment-friendly phosphorus-free phosphating solution

Examples

Experimental program
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Effect test

Embodiment 1

[0018] The phosphating solution of the present embodiment comprises the following components by weight: 4% ammonium fluorozirconate, 5% hydrofluoric acid, 1% boric acid, 0.1% ethylenediaminetetraacetic acid, 0.5% zinc molybdate, and the balance is water. Wherein: hydrofluoric acid is hydrofluoric acid aqueous solution, adopts 46% hydrofluoric acid to prepare the hydrofluoric acid aqueous solution that mass concentration is 24.5%. Control the conductivity range of the phosphating solution to be 6160 us / cm to 9000 us / cm, and the pH range to be 3.86 to 4.68.

[0019] The phosphating sample plate of this embodiment is a cold-rolled plate, and the process is spraying. In other embodiments, soaking can also be used, and the spraying effect is better.

[0020] Phosphating and post-treatment process includes the following steps:

[0021] (1) Degreasing the workpiece;

[0022] (2) Spray phosphating at room temperature around 20°C, and the phosphating time is 1 minute;

[0023] (3) ...

Embodiment 2

[0026] The phosphating solution of the present embodiment comprises the following components by weight: 5% ammonium fluozirconate, 6% hydrofluoric acid, 1.25% boric acid, 0.15% ethylenediaminetetraacetic acid, 1% zinc molybdate, and the balance is water. Wherein: hydrofluoric acid is hydrofluoric acid aqueous solution, adopts 46% hydrofluoric acid to prepare the hydrofluoric acid aqueous solution that mass concentration is 24.5%. Control the conductivity range of the phosphating solution to be 6160 us / cm to 9000 us / cm, and the pH range to be 3.86 to 4.68.

[0027] The phosphating sample plate of this embodiment is a cold-rolled plate, and the process is spraying. In other embodiments, soaking can also be used, and the spraying effect is better.

[0028] Phosphating and post-treatment process includes the following steps:

[0029] (1) Degreasing the workpiece;

[0030] (2) Spray phosphating at room temperature around 20°C, and the phosphating time is 1.5 minutes;

[0031] (...

Embodiment 3

[0034] The phosphating solution of the present embodiment comprises the following components by weight: 6% ammonium fluorozirconate, 7% hydrofluoric acid, 1.5% boric acid, 0.2% ethylenediaminetetraacetic acid, 1.5% zinc molybdate, and the balance is water. Wherein: hydrofluoric acid is hydrofluoric acid aqueous solution, adopts 46% hydrofluoric acid to prepare the hydrofluoric acid aqueous solution that mass concentration is 24.5%. Control the conductivity range of the phosphating solution to be 6160 us / cm to 9000 us / cm, and the pH range to be 3.86 to 4.68.

[0035] The phosphating sample plate of this embodiment is a cold-rolled plate, and the process is spraying. In other embodiments, soaking can also be used, and the spraying effect is better.

[0036] Phosphating and post-treatment process includes the following steps:

[0037] (1) Degreasing the workpiece;

[0038] (2) Spray phosphating at room temperature around 20°C, and the phosphating time is 1.5 minutes;

[0039]...

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Abstract

The invention discloses a quick environment-friendly phosphorus-free phosphating solution. The quick environment-friendly phosphorus-free phosphating solution comprises the following components in percentage by weight: 4 to 6 percent of ammonium zirconium hexafluoride, 5 to 7 percent of hydrofluoric acid, 1 to 1.5 percent of boric acid, 0.1 to 0.2 percent of ethylene diamine tetraacetic acid, 0.5 to 1.5 percent of zinc molybdate and the balance of water. Through a cross-cut tape adhesion test, the phosphorus-free phosphating solution can reach more than one grade in the aspect of increasing the adhesion of a metal base and a surface coating; through a salt spray resistance test, the salt spray resistance time of the phosphorus-free phosphating solution can reach 1,000 hours; and the phosphorus-free phosphating solution is convenient to prepare and has significance to environment friendliness.

Description

technical field [0001] The invention relates to a phosphating solution, in particular to a fast and environment-friendly phosphorus-free phosphating solution. Background technique [0002] The traditional phosphating treatment process in the metal surface treatment industry is subject to increasingly strict restrictions on phosphorus discharge. The development of phosphorus-free phosphating formulations and processes has become an inevitable trend in the development of the industry. At present, the demand for non-phosphorus phosphating solution is increasing rapidly, and it is urgent to carry out research on non-phosphorus phosphating technology and develop non-phosphorus phosphating solution products. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a fast and environment-friendly phosphorus-free phosphating solution. [0004] The present invention is achieved through the following techn...

Claims

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Application Information

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IPC IPC(8): C23C22/44
Inventor 李多德孟强刘继志闫永丽
Owner ANHUI QIMING SURFACE TECH
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