Composite plate groove inspection
Thread Content
Hello everyone, recently the factory has been working on manufacturing composite panels made of 316L+SA-516 Gr.70. When welding the longitudinal seam along the body of such panels, it is necessary to remove 30–40 mm of the composite layer from both sides of the weld seam first. The customer requested that the area after removal be tested with a copper sulfate solution; a red color indicated complete removal, while no color change indicated incomplete removal. So the questions are: 1. Does the presence of residues on the stainless steel cladding affect welding? 2. What is the principle behind the detection of this solution? 3. Do all plates that meet the requirements need to have their grooves inspected in this way? I’m seeking advice from the experts!
1. When welding composite panels, it is necessary to ensure that the transition layer has a certain thickness; therefore, the composite layer must be completely removed. 2. The principle is simple: a substitution reaction. I learned it in junior high school. 3. To ensure welding quality, it is best to do it this way