Is There Any Difference Between Passivation Of Stainless Steel Parts After Vacuum Annealing And Passivation Without Vacuum Annealing

Usually dehydrogenation heat treatment is parts in 190℃ ~ 220℃ oven heat preservation 2h above, different tensile strength materials have different heat preservation time. But this method is not completely dehydrogenated, and the passivated parts are dehydrogenated again, which will damage the passivated layer, turn the color passivated layer into white, and reduce the anti-rust grade. Therefore, it is necessary to use a temperature below 190℃ and a timely holding time for processing. In actual production, if the hydrogen embrittlement is not serious, the aging dehydrogenation treatment can also be used to place the parts for a period of time, but because the rust prevention period of electroplated parts is certain, it is impossible to place the parts for a long time.

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