[China Aluminum Network] Industrial aluminum spray cleaning method is widely used, due to complex equipment, high process requirements, in order to ensure good pre-treatment effect, we must start from the following aspects to control.
1. First of all we must strengthen the process.
Strictly enforce the operating procedures. Every day, the commissioner checks the operating status and observes the process parameters. It is prohibited to stagnate the workpiece in the device to prevent rust.
2. Control the amount of foam again.
In metal cleaning, the generation or removal of foam is important for the pre-treatment process, and a certain amount of foam is advantageous for certain treatment processes. Commonly used defoaming methods include: adding a defoamer; using a low-foaming surfactant; controlling the temperature; reducing the mixing of air and the like. However, the quality of industrial aluminum cleaners does not depend on the amount of foam, but when spraying in, the detergent is required to be low foaming, otherwise mass production cannot be performed normally.
3. Follow the quality of washing.
In the process of degreasing the workpiece, the surface is filled with residual liquid. If it is not washed, the product quality will be affected. Therefore, it is necessary to wash the residual liquid from the surface of the workpiece and remove it as water washing. In industrial production, in order to save water, washing water is generally recycled, so water washing will be gradually contaminated by cleaning agents. In order to reduce the degree of pollution, aluminum profiles should first minimize the contamination of the next process by the entrained cleaning solution. In addition, multi-stage washing should be considered, which is generally secondary washing, and some processes still use pure washing. The greater level of pollution in the subsequent level of water washing does not exceed one-tenth of that of the previous level, so that the residual concentration of the second level cleaning workpiece is only one percent of the original concentration. When adding clean water, use countercurrent supplements to save water.
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