避免不銹鋼鑄件污染的方法： 1、高電壓大電流密度沖擊法。即就是在不銹鋼鑄件氧化初期就采用高壓電擊，使已被氧化的部分通過電擊再連接成片。 2、表面打磨法。這個方法就是把打磨下來的鋁磨填充已被氧化部分留下的縫隙，使產生的縫隙連接在一起，作為橋梁的作用。 3、表面噴丸法。這種方法就是用圓頭錘子敲打縫隙，通過敲打使其閉合，可達到連成片的目的。 我們要根據不銹鋼鑄件被污染的程度選擇相對應的對應方法。 Methods to avoid contamination of stainless steel castings: 1. High voltage and high current density impact method. That is to say, in the early stage of oxidation of stainless steel castings, high voltage shocks are used to make the oxidized parts connect by electric shock. 2. Surface grinding method. This method is to fill the gaps left by the oxidation part by grinding the aluminum mill, so that the crevice will be joined together as a bridge. 3. Surface shot peening. This method is to use a round head hammer to crack the gap, and to knock it off to achieve the goal of becoming a film. We should choose the corresponding method according to the degree of contamination of stainless steel castings.