Brazing of stainless steel

 Because stainless steel contains Cr, Ni, Ti, Mn, N, Nb, Mo, Si, Cu and other metal elements, there are many types of surface oxides, among which chromium and titanium oxides have the best chemical stability. Must use very active flux and shielding gas or high vacuum brazing method. According to the use requirements of the brazing parts, the performance of the brazing joint, the brazing temperature, etc., different solders and brazing materials can be selected. Since chromium will form a stable oxide, a very active flux should be used. When soldering, zinc chloride hydrochloric acid solution, zinc chloride monochloromethane hydrochloric acid solution or phosphoric acid must be used.