Identify 302 and 304 , 316 and 317 stainless steel welding mesh

Time:

2024-11-11

Sulfuric acid immersion experiment of stainless steel wire mesh. This experiment is used to distinguish 302 and 304 from 316 and 317.

Firstly, the cut edge of the sample is finely ground, then immersed in nitric acid with a volume concentration of 20-30% and a temperature of 60-66 degrees for washing and passivation for half an hour.

Secondly, the sulfuric acid experimental solvent with a volume concentration of 10% is heated to 71 degrees.

Final observation:When 302 and 304 are just entered into this solution, they are rapidly corroded and produce samples with known compositions for approximate comparison. This can make the experiment more accurate.

keyword：

steel wire mesh,stainless

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