Sand blasting is often used for workpiece surface cleaning, such as eliminating residual sand and high carbon layer on the casting surface And welds of weldments to eliminate rust and scale. Acid and sand blasting are generally used for rust removal The latter is easy to make nitrogen penetrate into iron parts, increase internal stress and reduce plasticity, while sand blasting does not produce hydrogen embrittlement Whether it is high-carbon and high-strength steel, or elastic parts, brass parts, stainless steel parts and aluminum parts enter the next process after sandblasting, the adhesion of coating or oxide layer can be improved Hard chromium plated and coated workpieces are usually cleaned by sand blasting. Machine tool accessories and tools are usually polished by sand blasting before being milky white. Dalian sand blasting