Thiourea in a sulfuric acid solution causes silver sulfide (silver tarnish) to revert to silver metal by an electrolyticaction.
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.