Welding quality
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I’m not sure if welding is in this area; if it’s sent to the wrong area, please ask the administrator to move it for me. The image shows a weld; its color is somewhat reddish. Is such a weld considered acceptable, and what is the reason for this color? Thank you!
Overall, the welding quality of this weld is fairly good; the heat-affected zone is slightly reddened, which is mainly due to excessive movement of the welding electrode during welding, as required by the welding specifications. Acceptable weld colors are as follows: the best welds have the natural color of the metal (temperature control and gas shielding are required) ； The next one is golden yellow ； Blue ； gray ； Unacceptable colors are black and gray; this is usually caused by using excessive welding parameters and failing to provide proper protection (such as appropriate gas quality and cooling conditions).
The welding is good; it became shiny after pickling and passivation.