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Local chemical-plating technique for aluminum radiator bores

A local chemical and heat sink technology, applied in hot-dip plating process, liquid chemical plating, heat exchanger shell, etc., can solve the problems of high cost of aluminum heat sink and high cost of nickel-phosphorus alloy, and save nickel resources , easy to achieve, simple process effect

Inactive Publication Date: 2007-12-05
TWD METAL PRODN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] After the aluminum radiator is plated by the above electroless nickel-phosphorus alloy plating process, the entire aluminum radiator is plated with nickel-phosphorus alloy, including the inner hole and all other surfaces of the aluminum radiator, and other surfaces other than the inner hole of the aluminum radiator It does not need to be plated, and the cost of nickel-phosphorus alloy is relatively high, resulting in the high cost of aluminum radiators

Method used

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  • Local chemical-plating technique for aluminum radiator bores
  • Local chemical-plating technique for aluminum radiator bores

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Embodiment Construction

[0047] For further revealing the present invention, below in conjunction with embodiment is described, shown in accompanying drawing 2, it comprises the following steps:

[0048] The first step is to pre-treat the aluminum radiator, which is to degrease, wash, weakly corrode (weakly corrode it with lye), wash, light (pickling), and wash the aluminum radiator in sequence. Each process in the process is the same as the current existing process;

[0049] Step 2, shielding the inner hole, take a rubber tube that is longer than the length of the inner hole and smaller in diameter than the inner hole, one end of the rubber tube is closed, the other end of the rubber tube is connected to the inflator, and then the rubber tube is inserted Into the inner hole of the aluminum radiator, and then inflate the rubber tube through the air compressor, which is to connect the inflator to the air compressor, and then inflate the rubber tube through the inflator, the rubber tube expands and stic...

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Abstract

The present invention relates to chemical plating technology, and is especially local chemical plating process for holes of aluminum radiator. The local chemical plating process includes: shielding the holes of aluminum radiator, oxidizing chemically in a chemical oxidizing bath to form oxide film in the un-shielded parts of the aluminum radiator, and closed chemical plating to deposit zinc layer and coat Ni-P alloy layer in the walls of the holes without oxide film. The present invention has simple technological process, capacity of forming weldable Ni-P alloy layer only in the holes, saving in nickel source and capacity of lowering radiator producing cost.

Description

Technical field: [0001] The invention relates to the technical field of electroless plating of aluminum radiators, in particular to a partial electroless plating process for inner holes of aluminum radiators. Background technique: [0002] The aluminum radiator is made of many aluminum sheets stacked together by machining to form a radiator. After some of the radiators are fastened, there are inner holes on the aluminum radiator. The number of inner holes varies from 1 to 3, and the diameter of the inner hole is It ranges from 6 to 8 mm. The inner hole is reserved for the copper heat pipe. The copper heat pipe is inserted in the inner hole, but the welding performance between copper and aluminum is poor. In order to make the copper heat pipe and the inner hole firmly welded, the inner hole must be plated. The upper layer is a solderable nickel-phosphorous alloy. [0003] The surface of aluminum is easy to form a natural oxide film, which is not conducive to the electroplat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/32C23C18/18C23C22/05C23C2/06C23C2/38
CPCF28F21/08C23C18/1616C23C18/1653C23C18/32F28F9/18
Inventor 谢文珍李东林
Owner TWD METAL PRODN
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