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1·Thiourea in a sulfuric acid solution causes silver sulfide (silver tarnish) to revert to silver metal by an electrolytic action.

在硫酸溶液中硫脲会引起硫化银(氧化银)由电解行动恢复纯银色的金属。

2·The main effect factors of ultrasonic for the electrolytic passivation IF steel were related to the action of ultrasonic cavitation, elution and elevated-temperature.

超声波对IF钢电解钝化试样耐蚀性的影响主要是由超声空化作用、洗脱作用以及升温作用等几个方面来作用的。