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Low-temperature single-component zinc series phosphating solution and preparation method thereof

A zinc-based phosphating solution, a single-component technology, applied in the coating process of metal materials, etc., can solve the problems of poor corrosion resistance, rust return, flooding, etc., and achieve excellent corrosion resistance, stable bath solution, and film formation fast effect

Inactive Publication Date: 2012-10-03
武汉永正科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the existing two-component phosphating solution containing nitrite, which are prone to rusting, flooding, and poor corrosion resistance, and to provide a low-temperature single Component zinc phosphating solution and preparation method thereof

Method used

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  • Low-temperature single-component zinc series phosphating solution and preparation method thereof

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Embodiment 1

[0025] Low-temperature single-component zinc phosphating solution 1, in which the components and their contents are: zinc oxide 8g / L, phosphoric acid 24.7g / L, nitric acid 3.7g / L, nickel nitrate 0.3g / L, m-nitrobenzene sulfonate Sodium acid 0.8g / L, sodium chlorate 1.9g / L, hydroxylamine sulfate 1.2g / L, citric acid 1.3g / L, the balance is water.

Embodiment 2

[0027] Low-temperature single-component zinc-based phosphating solution 2, in which the components and their contents are: zinc oxide 5g / L, phosphoric acid 30g / L, nitric acid 3g / L, nickel nitrate 0.3g / L, sodium m-nitrobenzene sulfonate 1.5g / L, sodium chlorate 2.5g / L, hydroxylamine sulfate 2.5g / L, citric acid 1g / L, the balance is water.

Embodiment 3

[0029] Low-temperature single-component zinc phosphating solution 3, the components and their contents are: zinc oxide 9g / L, phosphoric acid 12.5g / L, nitric acid 6.2g / L, nickel nitrate 1g / L, m-nitrobenzene sulfonic acid Sodium 0.5g / L, sodium chlorate 1.5g / L, hydroxylamine sulfate 1g / L, citric acid 2g / L, the balance is water.

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Abstract

The invention discloses a low-temperature single-component zinc series phosphating solution and a preparation method thereof. The low-temperature single-component zinc series phosphating solution comprises the components of 5-9 g / L of zinc oxide, 12.5-30 g / L of phosphoric acid, 3-6.2 g / L of nitric acid, 0.3-1 g / L of nickel nitrate, 0.5-1.5 g / L of sodium m-nitrobenzenesulfonate, 1.5-2.5 g / L of sodium chlorate, 1-2.5 g / L of hydroxylamine sulphate, 1-2 g / L of citric acid, and the balance of water. According to the invention, sodium chlorate, hydroxylamine sulphate and sodium m-nitrobenzenesulfonate are used together as a compound accelerator, and the characteristics of the three accelerators are brought into full play, so that the prepared phosphating solution is stable, the sediment weight is light, and the performance of the phosphate film is good. The low-temperature single-component zinc series phosphating solution has the advantages of convenience in use, less difficulty in control technique, high speed of film formation, wide applications and simple preparation method.

Description

Technical field [0001] The invention relates to a zinc-based phosphating solution and a preparation method thereof, in particular to a low-temperature single-component zinc-based phosphating solution and a preparation method thereof. Background technique [0002] Various motor vehicles, electrical appliances, and metal crafts must be phosphated before painting to enhance adhesion to the coating and improve corrosion resistance. [0003] Currently, most of the phosphating solution on the market is a two-component phosphating solution of nitrite accelerator type. Nitrite: NO 2 - Is the most commonly used accelerator, often with NO 3 - Used in conjunction, but NO 2 - Unstable, easy to decompose, use NO 2 - The phosphating solution used as accelerator is double-packaged, mixed quantitatively during use, and refilled regularly. NO 2 - The content should be strictly controlled at 0.1~1.0g / L, the content is small, the promotion effect is weak; the content is too high, there will be more ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/17
Inventor 张才勇付挽得
Owner 武汉永正科技发展有限公司
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