Put 35% -HCl 100mL + water 900mL in 1L beaker, there was immersed a steel plate about 1 hour warmed at 70 ~ 80 ℃,
after the production of the steel plate that caused the smut of gray-black, with a 250mL Hull cell container , to implement the electrolytic cleaning under the following conditions.
Anodic electrolysis
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