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The treatment of the front surface of the welded stainless steel pipe is very important. We should also be familiar with and pay attention to some of the common points. Let's talk about how to deal with the front surface of the welded stainless steel pipe.
1.10%H2SO4, 15%HC, 5%HNO3, balance water. The pickling temperature is 100℃, the pickling time is the 30s, and then 15% HNO3 aqueous solution is used for gloss treatment, the solution temperature is 100℃, and the time is about 10s.
An aqueous solution of 2.6%H2SO2, 10%HNO3, 50g/LHF. The pickling temperature was 20℃, and the pickling time was 10min. After pickling, carefully wash with 60-70℃ hot water for 10min, and then dry in hot air at 60-70℃.
3.NO,50g/LNaF,85%H2O solution. Erosion at room temperature for 5~10min, then wash with hot water and dry at 100-120 ℃. Sometimes when a certain solder or brazing process must be used for some reason, it will cause the solder to not easily wet the base metal. Metals, copper and nickel are commonly used as coating materials.
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