High-precision washing process for PVD (Physical Vapor Deposition) coated part and PVD electroplated part

Abstract

The invention discloses a high-precision washing process for a PVD coated part and a PVD electroplated part. The process comprises the following sequentially-set steps: first-stage water washing, first-stage air washing, second-stage water washing, third-stage water washing, fourth-stage water washing, second-stage air washing, fifth-stage water washing, saponify-washing, vacuum water shearing, hydrocarbon washing, steam bath-washing, drying and gas-phase washing; therefore, high-precision washing of the PVD coated part and the PVD electroplated part can be realized by control on vacuum degree, temperature of a detergent, ultrasonic wave frequency and washing time in each step and by selection on the detergent in each step. The high-precision washing process disclosed by the invention has the advantages that complete pollutant treatment is realized, the yield can be increased to 98% or higher, the technique is simplified, the installation space is greatly reduced, the process satisfies the environment protection requirements by adopting an environment-friendly detergent, emission of waste water is reduced by 97% or higher, the recycle degree of the detergent during the later stage of the process is high, and the washing cost is low.

Description

technical field [0001] The invention relates to the field of workpiece surface cleaning, in particular to a high-precision cleaning process for PVD coated parts and electroplated parts. Background technique [0002] At present, traditional PVD coated parts and electroplated parts are mainly cleaned with pure water-based cleaning agents, that is, through the emulsification, penetration, cleaning and other properties of water-based cleaning agents such as surfactants, organic acids and alkalis, and acid-base chemical reactions. , After multiple channels of pure water cleaning, the purpose of cleaning is finally achieved. The main process is: ultrasonic cleaning—ultrasonic pure water rinsing—ultrasonic cleaning—ultrasonic pure water rinsing—ultrasonic cleaning—ultrasonic pure water rinsing—slow dehydration—drying, although the The process can meet the cleaning requirements, but it has the following disadvantages: [0003] 1. Fine and strict requirements for process control, hi...

AI Technical Summary

Problems solved by technology

[0003] 1. Fine and strict requirements for process control, high water quality requirements and large usage, large amount of waste water and high cost;

[0004] 2. The replacement frequency of the cleaning agent is fast, the surfactant cannot be recycled, there is sewage discharge, the sewage treatment is difficult and costly;

[0005] 3. Inorganic acids and bases not only pollute the environment, but also have a high risk factor when operated by humans, and are harmful to the body if exposed to them for too long;

[0006] 4. The quality is unstable and fluctuates greatly, and it is easy to cause adverse effects such as insufficient cleanliness or watermarks on the PVD coating effect, and the defect rate is as high as 5%-10%.

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