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Universal environment-friendly non-phosphorus phosphating solution

A general environmental protection, phosphating solution technology, applied in the field of phosphating solution, can solve the problems of phosphorus discharge restrictions, achieve the effect of reduced corrosion resistance and 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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  • Universal environment-friendly non-phosphorus phosphating solution

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Effect test

Embodiment 1

[0019] The phosphating solution of this embodiment includes the following components by weight: 3% ammonium fluozirconate, 5% nitric acid, 1.5% boric acid, 0.4% ethylenediaminetetraacetic acid, 3% sodium nitrite, and 1% zinc molybdate , and the balance is water. Wherein: nitric acid is nitric acid aqueous solution, adopts 98% nitric acid to prepare the nitric acid aqueous solution that mass concentration is 26%. Control the conductivity range of the phosphating solution to be 6160 us / cm-7440 us / cm, and the pH range to be 3.86-4.68.

[0020] 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.

[0021] Phosphating and post-treatment process includes the following steps:

[0022] (1) Degreasing the workpiece;

[0023] (2) Spray phosphating at room temperature around 20°C, and the phosphating time is 2 minutes;

[0024] (3) Wash in cold water at a...

Embodiment 2

[0027] The phosphating solution of this embodiment includes the following components by weight: 4% ammonium fluozirconate, 6% nitric acid, 1.7% boric acid, 0.5% ethylenediaminetetraacetic acid, 3.2% sodium nitrite, and 2% zinc molybdate , and the balance is water. Wherein: nitric acid is nitric acid aqueous solution, adopts 98% nitric acid to prepare the nitric acid aqueous solution that mass concentration is 26%. Control the conductivity range of the phosphating solution to be 6160 us / cm-7440 us / cm, and the pH range to be 3.86-4.68.

[0028] 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.

[0029] Phosphating and post-treatment process includes the following steps:

[0030] (1) Degreasing the workpiece;

[0031] (2) Spray phosphating at room temperature around 20°C, and the phosphating time is 3 minutes;

[0032] (3) After washing in cold...

Embodiment 3

[0035] The phosphating solution of this embodiment includes the following components by weight: 5% ammonium fluozirconate, 7% nitric acid, 2% boric acid, 0.6% ethylenediaminetetraacetic acid, 3.4% sodium nitrite, and 2.5% zinc molybdate , and the balance is water. Wherein: nitric acid is nitric acid aqueous solution, adopts 98% nitric acid to prepare the nitric acid aqueous solution that mass concentration is 26%. Control the conductivity range of the phosphating solution to be 6160 us / cm-7440 us / cm, and the pH range to be 3.86-4.68.

[0036] 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.

[0037] Phosphating and post-treatment process includes the following steps:

[0038] (1) Degreasing the workpiece;

[0039] (2) Spray phosphating at room temperature around 20°C, and the phosphating time is 5 minutes;

[0040] (3) After washing in cold...

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Abstract

The invention discloses a universal environment-friendly non-phosphorus phosphating solution, which comprises the following components in percentage by weight: 3 to 5 percent of ammonium zirconium hexafluoride, 5 to 7 percent of nitric acid, 1.5 to 2 percent of boric acid, 0.4 to 0.6 percent of ethylene diamine tetraacetic acid, 3 to 3.4 percent of sodium nitrite, 1 to 2.5 percent of zinc molybdate and the balance of water. An adhesion test and a salt spray test show that the non-phosphorus phosphating solution has a good effect on improvement in the adhesion force of a metal substrate and a surface coating, the adhesion force obtained by the adhesion test is over 1 grade, and the adhesion force obtained by the salt spray test can be maintained for 1,000 hours; and the non-phosphorus phosphating solution is convenient to prepare and significant for environmental protection.

Description

technical field [0001] The invention relates to a phosphating solution, in particular to a general 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 object of the invention is to overcome the deficiencies of the prior art and provide a general environment-friendly phosphorus-free phosphating solution. [0004] The present invention is achieved through the following technical soluti...

Claims

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Application Information

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