If rust is found at the welding part of the stainless steel seamless elbow, it means that rust has occurred. In this case, we should find out the cause in time and deal with it accordingly.
So what factors will cause rust at the welding part of the stainless steel seamless elbow?
① The oxide scale is not cleaned up
Since the stainless steel seamless elbow is made of stainless steel, it is easy to produce oxide scale when it comes into contact with air. If the oxide scale is not cleaned up during welding, a layer of oxide will be formed, causing iron ions to overflow from the welding part of the stainless steel seamless elbow, causing rust.
② The welding temperature is too high
The temperature of the welding arc is generally above 2500℃. At this time, the oxide on the surface of the stainless steel will be reduced and volatilized, generating high-temperature oxides and metal oxides, increasing the rust rate at the welding part.
③ Improper treatment
If the stainless steel seamless elbow is not treated as required according to the specifications after welding (failure to clean the oxide at the welding part in time, failure to take protective measures, etc.), it is easy to cause rust at the welding part.