In general, the cleaning of the surface of stainless steel castings can be divided into two categories: dry and wet. Dry cleaning method mainly involves shot blasting treatment, while wet cleaning method mainly includes hydraulic cleaning, water cleaning, etc.
Dry cleaning method is a friction treatment method that mainly uses shot blasting to clean the surface of stainless steel castings. Shot blasting, in simple terms, uses compressed air as the power to spray the shot at a certain speed onto the surface of stainless steel castings, removing sand and iron oxide scales on the surface. However, due to low efficiency, uneven cleaning, and poor effectiveness, this friction cleaning method has been widely adopted by manufacturers and has been almost eliminated.
The wet type method is mainly based on the principle of the electro-hydraulic hammer effect, which uses a high-voltage pulse generator to discharge between phases through a special electrode placed in water, generating a large hydraulic impact. Due to the difference in elastic modulus and vibration frequency between the surface adhesion of stainless steel castings and the castings themselves, the goal of sand cleaning is achieved. For complex shaped stainless steel castings such as deep holes, blind holes, and inner cavities, it has a relatively effective cleaning effect. It is currently a widely used surface cleaning method for a series of castings, including stainless steel castings.
The above are two common methods for cleaning the surface of stainless steel castings. It is important to remind everyone that these two cleaning methods are not only applicable to stainless steel castings. The vast majority of metal casting products require surface cleaning during the processing and forming process, which is an indispensable process in metal casting products. The main function of cleaning the surface of castings is to remove a series of impurities such as sand and iron oxide scale on the surface of metal castings, making the surface of stainless steel castings have a stainless steel metallic luster and meet the product's execution standards. Therefore, surface cleaning of stainless steel castings is very important. When cleaning the surface of stainless steel castings, everyone must follow the correct method. Only then can the quality of stainless steel castings be guaranteed.