Austenitic stainless steel surface chemical nickel-phosphorus plating method

A technology of austenitic stainless steel and electroless nickel-phosphorus plating, applied in liquid chemical plating, metal material coating process, coating, etc. Destruction and other problems, to achieve the effect of simple process and expansion of application fields

Inactive Publication Date: 2011-05-11
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in some highly active anions, especially in the environment containing C1-, the passivation film is easily destroyed, so that the corrosion resistance of austenitic stainless steel is seriously reduced; in addition, the hardness of austenitic stainless steel is low, and the corrosion resistance The abrasiveness is not very good, which restricts the use of a

Method used

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  • Austenitic stainless steel surface chemical nickel-phosphorus plating method
  • Austenitic stainless steel surface chemical nickel-phosphorus plating method
  • Austenitic stainless steel surface chemical nickel-phosphorus plating method

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Embodiment 1

[0040] In this embodiment 1, high-phosphorus electroless nickel plating is carried out on austenitic stainless steel, which specifically includes the following steps:

[0041] A1. Degreasing: Soak austenitic stainless steel in acetone solution for 2 minutes to treat the surface of austenitic stainless steel with oil.

[0042] A2. Rinse the degreased austenitic stainless steel with cold water for 2 minutes.

[0043] A3. Phosphating treatment: Put the austenitic stainless steel into lye and soak for 20min at a temperature of 80°C. The lye contains: NaOH 40g / L, NaOH 2 CO 3 20g / L, Na 3 PO 4 12H 2 O 70g / L, Na 2 SiO 3 10g / L.

[0044] A4. Cleaning: first wash with warm water at 30°C for 2 minutes, then rinse with cold water for 2 minutes.

[0045] A5. Acid activation treatment: put austenitic stainless steel in 50% HCl and 10% H 2 SO 4 Acidification treatment in the mixed solution, temperature: room temperature, etching time: 2min.

[0046] A6. Cleaning: Rinse with pure wa...

Embodiment 2

[0058] The method for electroless nickel-phosphorus plating on the surface of austenitic stainless steel of embodiment 2 is similar to embodiment 1, and its difference from embodiment 1 is that in embodiment 2, medium phosphorus electroless nickel plating solution is used to carry out chemical immersion plating, specifically comprising the following The above steps:

[0059] B1. Degreasing: Soak the austenitic stainless steel in acetone solution for 2 minutes to treat the oil stain on the surface of the austenitic stainless steel.

[0060] B2. Rinse the degreased austenitic stainless steel with cold water for 2 minutes.

[0061] B3. Phosphating treatment: Put the austenitic stainless steel into the lye and soak it for 10 minutes at a temperature of 90°C. The lye contains: NaOH 60g / L, NaOH 2 CO 3 30g / L, Na 3 PO 4 12H 2 O 50g / L, Na 2 SiO 3 5g / L.

[0062] B4. Cleaning: Wash with warm water at 30°C for 3 minutes, then rinse with cold water for 1 minute.

[0063] B5. Acid ...

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Abstract

The invention relates to an austenitic stainless steel surface chemical nickel-phosphorus plating method, which comprises the following steps of: degreasing: removing greasy dirt from the surface of an austenitic stainless steel; acid liquor activation: putting the austenitic stainless steel into activating solution for erosion; and chemical nickel-phosphorus plating: chemically plating nickel and phosphorus on the austenitic stainless steel in chemical nickel-phosphorus plating solution, wherein the chemical nickel-phosphorus plating solution contains 20 to 30g/L of nickel salt, 20 to 35g/L of sodium hypophosphite and 35 to 60g/L of auxiliary agent. The austenitic stainless steel surface chemical nickel-phosphorus plating method has simple process, can select the phosphorus content of a coating as required, can form a uniform nickel-phosphorus coating with good acid, alkali and salt resistance on the outer surface of the austenitic stainless steel, and enlarges the application field of the austenitic stainless steel.

Description

technical field [0001] The invention relates to the field of surface treatment of austenitic stainless steel, in particular to a method for chemically plating nickel and phosphorus on the surface of austenitic stainless steel. Background technique [0002] A dense passivation film is easily formed on the surface of austenitic stainless steel. This dense passivation film has certain corrosion resistance, so austenitic stainless steel is widely used. However, in some highly active anions, especially in the environment containing C1-, the passivation film is easily destroyed, so that the corrosion resistance of austenitic stainless steel is seriously reduced; in addition, the hardness of austenitic stainless steel is low, and the corrosion resistance The abrasiveness is not very good, which restricts the use of austenitic stainless steel, and the electroless nickel-phosphorus plating can better solve the above defects. [0003] However, due to the dense passivation film on the...

Claims

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Application Information

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IPC IPC(8): C23C18/36C23C18/18
Inventor 周明杰许勇
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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