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A normal-temperature phosphating solution for forming a high-corrosion-resistant phosphating film, a preparation method and a phosphating process

A technology of phosphating film and phosphating solution, which is applied in the direction of metal material coating process, can solve the problems of high energy consumption, long processing time, and increased phosphating cost for phosphating treatment, so as to reduce the cost of phosphating and increase the cost of phosphating. Protective, time-saving phosphating effect

Inactive Publication Date: 2018-05-01
CENT IRON & STEEL RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a normal temperature phosphating solution for forming a highly corrosion-resistant phosphating film, a preparation method and a phosphating process, so as to solve the problems of high energy consumption, long processing time, and phosphorus The problem of complex phosphating process and increased phosphating cost, not only can quickly form a phosphating film with high corrosion resistance at room temperature, but also does not require degreasing and rust removal and sealing treatment after phosphating, simplifies the phosphating process, and improves phosphating efficiency. cut costs

Method used

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  • A normal-temperature phosphating solution for forming a high-corrosion-resistant phosphating film, a preparation method and a phosphating process
  • A normal-temperature phosphating solution for forming a high-corrosion-resistant phosphating film, a preparation method and a phosphating process

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Effect test

Embodiment 1

[0038] Weigh the corresponding components according to the following proportions:

[0039]

[0040] Then add the above components into deionized water one by one to make a 1L solution, stir evenly to dissolve completely, and make a room temperature phosphating solution for forming a high corrosion-resistant phosphating film.

[0041] The phosphating solution is: zinc dihydrogen phosphate 40g / L, zinc nitrate 70L, sodium chlorate 2 / L, sodium m-nitrobenzenesulfonate 1.5g / L, hydroxylamine sulfate 1g / L, tartaric acid 1 / L, fluoride Sodium 1g / L, OP-10 emulsifier 2g / L, the balance is water.

[0042] With the phosphating solution at a temperature of 25°C, the iron and steel workpieces were soaked (or sprayed) for 10 minutes, and then dried naturally to obtain a uniform, compact, and corrosion-resistant phosphating film.

[0043] The phosphating film film thickness that embodiment 1 obtains is 2-3.5g / m 2 , the phosphating film and the paint film are closely combined, and the result...

Embodiment 2

[0045] Weigh the corresponding components according to the following proportions:

[0046]

[0047] Then add the above components into deionized water one by one to make a 1L solution, stir evenly to dissolve completely, and make a room temperature phosphating solution for forming a high corrosion-resistant phosphating film.

[0048] The phosphating solution is: zinc dihydrogen phosphate 60g / L, zinc nitrate 80L, sodium chlorate 3 / L, sodium m-nitrobenzenesulfonate 2g / L, hydroxylamine sulfate 2g / L, tartaric acid 2 / L, sodium fluoride 2g / L, OP-10 emulsifier 4g / L, and the balance is water.

[0049] Apply the phosphating solution to the iron and steel workpiece at a room temperature of 25-30°C by brushing, brushing twice, and drying naturally to obtain a uniform and compact phosphating film with good corrosion resistance.

[0050] The phosphating film film thickness that embodiment 2 obtains is 2-3.5g / m 2 , Phosphate film neutral salt spray test 10 hours without corrosion.

[00...

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Abstract

The invention relates to a normal-temperature phosphating solution forming a phosphating film highly resistant to corrosion, a preparing method and a phosphating technology. The phosphating solution comprises 40-60 g / L of dihydric phosphate, 60-80 g / L of nitrate, 2-4 g / L of chlorate, 1-2 g / L of nitrophenol compound, 1-3 g / L of hydroxylamine sulphate, 1-3 g / L of organic acid complexing agent, 1-2 g / L of sodium fluoride, 2-4 g / L of surfactant and the balance water. By means of the phosphating solution, a workpiece is soaked and subjected to spraying for 5-20 min or brushed 2-3 times at the normal temperature of 5-40 DEG C, and then the workpiece is naturally aired to obtain the phosphating film. According to the normal-temperature phosphating solution forming the phosphating film highly resistant to corrosion and the phosphating technology, the phosphating film highly resistant to corrosion can be rapidly formed at the normal temperature, and meanwhile no oil removing, rust removing and post-phosphating closing treatment is needed. The phosphating technology is simplified, the phosphating efficiency is improved, the cost is reduced, the formed phosphating film is even and dense, and higher corrosion resistance is achieved.

Description

technical field [0001] The invention relates to the technical field of iron and steel surface treatment, in particular to a normal-temperature phosphating solution for forming a high-corrosion-resistant phosphating film, a preparation method and a phosphating process. Background technique [0002] As a treatment method to improve the corrosion resistance of steel, phosphating treatment has been widely used in the fields of automobile, machinery industry, household appliances, shipbuilding industry, aviation industry and weapon equipment manufacturing. And after more than 100 years of development, it has become an indispensable and important technology for steel processing, anti-corrosion, and decoration. [0003] Phosphating treatment is to put the metal into the phosphating solution composed of phosphoric acid, phosphate and other chemicals. Under certain process conditions, the metal is contacted and soaked in the phosphating solution, so that chemical and electrochemical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/36C23C22/73C23C22/76
CPCC23C22/362C23C22/73C23C22/76
Inventor 陈小平李勇王向东黄涛王帆
Owner CENT IRON & STEEL RES INST
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