The reasons for blackened aluminum die casting parts after shot blasting are:
1. The dust removal is not done in the equipment during shot blasting;
2. There are oil stains, mold release and moisture on the casting surface;
3. Stainless steel pellets are not pure enough.
To prevent the aluminum die casting parts from blackening after shot blasting, here is some suggestion:
1. The shot blasting equipment must have a relatively complete automatic dust removal effect;
2. The surface of the casting should not be contaminated with oil, mold release agent, moisture or other impurities. If necessary, the casting should be washed and dried before shot blasting;
3. Purchase pure steel shots, if necessary, add 10 ~ 30% aluminum shots to increase the whiteness after shot blasting. The specific amount depends on the requirement of the parts.
EMP Tech is one of professional aluminium die casting manufacturer china. We provide Automotive Parts, Machinery Parts, shot blasting aluminum castings and so on. Want to know more? Please contact us.
