Method for repairing surface defect of silver-plated workpiece at low temperature without color difference

Abstract

The invention discloses a method for repairing the surface defect of a silver-plated workpiece at a low temperature without color difference. The method comprises the following steps: step 1, pre-treating the to-be-repaired workpiece, step 2, gluing: selecting a silver colloid, uniformly injecting the silver colloid onto a defective surface, ensuring that the injected silver colloid is slightly higher than the defective surface and airing for 5-10 minutes; scraping the silver colloid on an aired product by using a special tool and airing for 20-24 hours, so that the aired product is naturally cured; step 3, warming and curing; and step 4, carrying out surface silver immersion treatment. The method for repairing the surface defect of the silver-plated workpiece at a low temperature without color difference has the beneficial effects that the repaired position surface is level and smooth without color difference, a repair trace is difficult to observe basically, and most importantly, the strength, the conductivity and other technical performances of the workpiece can not be changed; the existing problem that a workpiece can not be repaired due to appearance defect to be discarded can be completely solved; meanwhile, the operation is simple, the cost is low, the application surface is wide, and the application range of the silver colloid is broadened. The method is an economic and practical new technology and an economic and practical new process.

Description

technical field [0001] The invention relates to a method for repairing surface defects of silver-plated workpieces, in particular to a method for repairing silver-plated workpieces at low temperature and without color difference, which has good repair effect, simple operation, low cost, wide applicability and wide application range of epoxy silver glue. The method for surface defects belongs to the technical field of electroplating. Background technique [0002] In industrial production activities, more expensive aluminum alloy workpieces with silver-plated surfaces are often encountered, with defects such as blisters, bubbles, and cracks on the surface, such as filters, one of the main original components of communication equipment, which are AlSi12, ADC12, AlSi9Cu3, etc. Aluminum alloy die-casting parts, which contain precision cavities with complex shapes and uneven wall thicknesses, require CNC finishing, silver-plated inner cavities, and powder-sprayed outer cavities. ...

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Problems solved by technology

[0002] In industrial production activities, more expensive aluminum alloy workpieces with silver-plated surfaces are often encountered, with defects such as blisters, bubbles, and cracks on the surface, such as filters, one of the main original components of communication equipment, which are AlSi12, ADC12, AlSi9Cu3, etc. Aluminum alloy die-casting parts, which contain precision cavities with complex shapes and uneven wall thicknesses, require CNC finishing, silver-plated inner cavities, and powder-sprayed outer cavities. Affected by factors such as washing, alkali washing, etc., after the silver plating results of some workpieces, it is often found that there are small blisters and pores in the cavity, and cracks and other defects appear on the side walls. This will not only affect the appearance of precision workpieces but also affect the quality of debugging. If For this reason, it is judged as unqualified, and the loss will be great; if the conventional repair methods such as "brush plating" and "argon arc welding" can not meet the requirements, there is also color difference, so it is impossible to achieve a satisfactory repair effect

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