First of all, you can remove the oil with organic solvent. If the oil stain is not too serious, you can soak it in the solvent for a short time. If the oil stain is more serious, you can use cotton yarn to wipe with solvent, or scrub with a bristle brush. Attention should be paid to reliability in operation, and the remaining solvent should be properly kept after use.
Air drying, no matter what kind of organic solvent cleaning method is adopted, cannot be saved in the air drying process, otherwise it will lose the significance of cleaning.
Binding, here we suggest the choice of aluminum wire, do not use copper wire and galvanized iron wire, can be used to remove the zinc layer of iron wire.
Circulating water washing, alkaline washing after washing is better to use hot water washing, so that it is more conducive to cleaning the surface of the alkaline substances, the workpiece with blind holes, slit to strengthen the part of the washing, and discard the residual solution, and immediately converted to nitric acid out of light, so as not to be subjected to oxidation.
When nitric acid is out of light, 50mL/L hydrofluoric acid should be added on the basis of this formula to accelerate the removal of insoluble matter that adheres to the surface of aluminum parts during alkaline washing.
