In some plastic plating plants in the south in the summer, it is often found that there are some white spots on the plated parts, and it is difficult to wipe off, affecting the appearance of the product, and even leading to scrapping. Although the plating process conditions are normal, it is difficult to avoid, and even appears in large quantities. This is a special plating problem, called electroplating parts.
Prevention method:
According to the above discussion, the key to preventing mildew of plastic plating parts is to control the source of mildew microorganisms, minimize the chance of contact with the products, and sterilize them in the stage and place where they are effectively adhered, so as to eliminate mold microorganisms as much as possible. Living conditions. The following specific measures can be taken in actual production:
(1) Pay attention to the ventilation, dust removal and sterilization of the workshop and warehouse, and reduce or eliminate the source of microbial contamination as much as possible.
(2) Keep the raw materials clean and hygienic. For example, the sodium citrate solution for electroless nickel plating should be heated to about 80 ° C for sterilization after the addition.
(3) The water used should be sterilized. The ion exchange resin in the water treatment device should be cleaned regularly with formaldehyde or ethanol; after chemical nickel plating, the appropriate amount of formaldehyde should be added to the water tank every day, and ethanol should be applied every time the cylinder is wiped; the water for washing after bright chrome plating must be ultraviolet light. The lamp is sterilized by irradiation.
(4) The temperature and time for the plating of the electroplated parts must be sufficient. It is absolutely forbidden to have water on the workpiece after drying.
(5) The white gauze gloves used for inspection and packaging are dry and clean, and plastic film gloves should be worn inside.
(6) Packaging supplies should be clean and dry, and desiccant and anti-mold agent can be placed in the box.
(7) Electroplated parts should not be placed in the high temperature and high humidity workshop for too long, and should be quickly moved into the warehouse after packaging.