What measures should be taken to prevent stress corrosion of seamless stainless steel elbows?
When stress corrosion is found in seamless stainless steel elbows, these operations should be followed:[Stop risk first]
Immediately stop using elbows that are subjected to stress corrosion, avoid further pressure or contact with corrosive media (such as chlorine containing liquids, acidic water), and prevent crack propagation.
【 Investigate the Causes 】
Find out why the corrosion occurred – whether it was due to excessive chloride ions in the medium or residual stress on the elbow during installation (such as not having undergone stress relief treatment).[Repair or Replace]
For cracks that are shallow and have a small range, they can be polished off and then passivated to restore corrosion resistance; For those with deep and numerous cracks, simply replace the elbow with a new one and prioritize materials with better corrosion resistance (such as 316L, which is more resistant to stress corrosion than 304).
Remove hidden dangers
Addressing the underlying causes – such as replacing corrosion-resistant media, performing stress relief heat treatment on new elbows, and regularly testing the composition of the media to prevent further problems.
What measures should be taken to prevent stress corrosion of seamless stainless steel elbows?
When stress corrosion is found in seamless stainless steel elbows, these operations should be followed:[Stop risk first]
Immediately stop using elbows that are subjected to stress corrosion, avoid further pressure or contact with corrosive media (such as chlorine containing liquids, acidic water), and prevent crack propagation.
【 Investigate the Causes 】
Find out why the corrosion occurred – whether it was due to excessive chloride ions in the medium or residual stress on the elbow during installation (such as not having undergone stress relief treatment).[Repair or Replace]
For cracks that are shallow and have a small range, they can be polished off and then passivated to restore corrosion resistance; For those with deep and numerous cracks, simply replace the elbow with a new one and prioritize materials with better corrosion resistance (such as 316L, which is more resistant to stress corrosion than 304).
Remove hidden dangers
Addressing the underlying causes – such as replacing corrosion-resistant media, performing stress relief heat treatment on new elbows, and regularly testing the composition of the media to prevent further problems.