Stripping solution for chemical nickel-plated coating of cast aluminum piece and stripping method

A technology for electroless nickel plating and cast aluminum parts, applied in the field of deplating solution for electroless nickel plating of cast aluminum parts, can solve the problems of high cost of deplating, long operation time, complicated process, etc., and achieve simple manufacturing process and easy control , the effect of reducing the production cost

Active Publication Date: 2015-06-03
SICHUAN JIUZHOU ELECTRIC GROUP
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Problems solved by technology

[0007] Aiming at the shortcomings of the above-mentioned traditional electroless nickel plating stripping method for cast aluminum parts and the stripping solution used, the present invention provides a kind of electroless nickel plating stripping solution for cast aluminum parts to solve the traditional electroless nickel plating stripping solution. The defect that the solution damages the substrate
[0008] On the other hand, the present invention provides a kind of deplating method based on above-mentioned deplating solution, to solve the problems of complex process, long operation time and high deplating cost in the prior art

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  • Stripping solution for chemical nickel-plated coating of cast aluminum piece and stripping method

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings, but it is not intended to limit the present invention. Such as figure 1 As shown, the deplating solution is firstly deplated in step S1. Specifically, a deplating solution comprising nitric acid, sodium m-nitrobenzenesulfonate, nickel powder, pure water, hydrofluoric acid, and sodium chloride is first mixed to prepare a deplating solution. Among them, hydrofluoric acid and nitric acid are used as oxidizing agents, and sodium chloride and nickel powder are used as corrosion inhibitors. The present invention has no specific requirements on the concentration and pH of the above-mentioned raw materials. Preferably, in the present embodiment, the nitric acid in the deplating solution is 600ml / L, the pure water is 300ml / L, the hydrofluoric acid is 100ml / L, the sodium chloride content is 10g / L, and sodium m-nitrobenzenesulfonate Content is 15g / L, and described nick...

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Abstract

The invention provides a stripping solution for the chemical nickel-plated coating of a cast aluminum piece. The stripping solution contains nitric acid, sodium 3-nitrobenzene sulfonate, nickel powder, pure water, hydrofluoric acid and sodium chloride. The stripping solution provided by the invention is capable of realizing secondary utilization of unaccepted materials generated in the chemical nickel-plating production process; therefore, the production process level is greatly improved; and the stripping solution is simple in operation, easy for control, low in cost and the like.

Description

technical field [0001] The invention relates to the field of cast aluminum technology, more specifically, relates to a deplating solution and a deplating method for electroless nickel plating of cast aluminum parts Background technique [0002] The cast aluminum process has the characteristics of high mechanical strength, low density, good thermal and electrical conductivity, good toughness, and easy processing. Therefore, it is widely used in industrial fields, especially aerospace, defense industries, and even people's daily life. Applications. [0003] The surface of cast aluminum is covered with a layer of dense oxide film, which can isolate cast aluminum from the surrounding environment and avoid being oxidized. However, this layer of oxide film is easily corroded by strong acid and strong alkali. At the same time, cast aluminum also produces intergranular corrosion, which reduces the surface hardness and is not wear-resistant. Therefore, corrosion has become one of t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F1/28
Inventor 何锡勇
Owner SICHUAN JIUZHOU ELECTRIC GROUP
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