Chemical plating solution and its use in low concentration standard gas packaging container

A technology for chemical plating solution and packaging container, applied in liquid chemical plating, metal material coating process, coating and other directions, can solve problems such as adverse consequences, and achieve the effects of improving adhesion, enhancing corrosion resistance and uniform thickness

Inactive Publication Date: 2005-01-19
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Use H 2 When preparing a low-concentration standard gas for an extremely active gas such as S, a special specially treated gas cylinder must be used. If the gas cylinder is not treated or handled improperly, it will bring adverse consequences.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Adopt the method of the present invention to carry out plating on the inner surface of 41 aluminum alloy containers, operate successively according to the following steps:

[0043] (1) Degreasing

[0044] Wash 2 times with acetone.

[0045] (2) In addition to oxide layer

[0046] Treat with 15% hydrochloric acid for 5 minutes to remove scale.

[0047] (3) activation

[0048] Using 8% H by weight 2 SO 4 As an activation solution, the activation time at room temperature is 5 minutes. In order to remove the extremely thin oxide film on the surface of the sample, activation treatment should be performed before electroless plating.

[0049] (4) Electroless plating

[0050] Its acid bath formula is as follows:

[0051] Nickel sulfate: 27g / l

[0052] Sodium hypophosphite: 30g / l

[0053] Sodium acetate: 20g / l

[0054] DL-malic acid: 12g / l

[0055] Lactic acid: 10g / l

[0056] Propionic acid: 10g / l

[0057] Succinic acid: 16g / l

[0058] Lead acetate: 2ppm

[0059] ...

Embodiment 2

[0075] Adopt method of the present invention to carry out plating at 41 steel container inner surfaces, operate successively according to the following steps:

[0076] (1) Degreasing

[0077] Rinse twice with acetone.

[0078] (2) In addition to oxide layer

[0079] Steel container: sand blasted.

[0080] (3) activation

[0081] Using 12% H by weight 2 SO 4 As an activation solution, the activation time at room temperature is: 3 minutes.

[0082] (4) Electroless plating

[0083] Its acid bath formula is as follows:

[0084] Nickel sulfate: 22g / l

[0085] Sodium hypophosphite: 35g / l

[0086] Sodium acetate: 22g / l

[0087] DL-malic acid: 15g / l

[0088] Lactic acid: 8g / l

[0089] Propionic acid: 12g / l

[0090] Succinic acid: 10g / l

[0091] Lead acetate: 1ppm

[0092] Thiourea: 0.8 ppm.

[0093] The components of the electroless plating solution are added in turn and mixed uniformly before electroless plating, and the electroless plating process parameters are as f...

Embodiment 3

[0108] The difference from Example 1 is:

[0109] Adopt the method of the present invention to carry out plating on the inner surface of 41 aluminum alloy containers, operate successively according to the following steps:

[0110] (1) Degreasing

[0111] Wash 3 times with acetone.

[0112] (2) In addition to oxide layer

[0113] Treat with 12% hydrochloric acid for 8 minutes to remove scale.

[0114] (3) activation

[0115] Using 5% H by weight 2 SO 4 As an activation solution, the activation time at room temperature is 10 minutes. In order to remove the extremely thin oxide film on the surface of the sample, activation treatment should be performed before electroless plating.

[0116] (4) Electroless plating

[0117] Its acid bath formula is as follows:

[0118] Nickel sulfate: 24g / l

[0119] Sodium hypophosphite: 40g / l

[0120] Sodium acetate: 24g / l

[0121] DL-malic acid: 20g / l

[0122] Lactic acid: 25g / l

[0123] Propionic acid: 20g / l

[0124] Succinic acid: ...

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Abstract

The invention relates to a chemical plating solution and its use in low concentration standard gas packaging container which comprises, by using sodium hypophosphite as reducing agent, using nickel sulfate as the main salt as well as addition complexing agent, accelerating agent, stabilizing agent, wherein the inner surface of the container employs 5-15% H2SO4 as activating liquid, coating inert layer inside the container, conducting chemical plating and proceeding hole sealing treatment with CrO3.

Description

technical field [0001] The invention relates to a surface treatment process of a gas packaging container, in particular to an electroless plating solution and its application in chemical treatment of the inner surface of a low-concentration standard gas packaging container. Background technique [0002] Standard gases are widely used in industry. Especially for low-concentration standard gases, in use, when the standard gas components are in contact with the inner wall of the container, adsorption, desorption and chemical reactions are often caused. The lower the concentration, the more complicated this change is, therefore, the packaging and storage of low concentration standard gas has become a very important issue. At present, chemical polishing of aluminum cylinders or phosphating of steel cylinders are widely used in the world as the inner surface treatment method of gas cylinders. Among them, chemical polishing has poor corrosion resistance, while phosphating has prob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/36
Inventor 金花子吴杰刘芳欣胡宗杰陈金生熊天英
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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