Irradiation-induced brightening of tarnished Ag nanoparticles

The research progress on corrosion and protection of silver layer

“…The analysis and characterization of the Ag discoloration part and corrosion layer mainly includes: Based on the analysis of discoloration site and corrosion layer of Ag objects, the scientists and technicians have developed the corresponding cleaning methods to recover the appearance and performance of corroded Ag, which includes: mechanical cleanings [19,20], chemical cleanings [19][20][21] (sodium glycinate, thiourea acid solution, thiosulphate solution, formic acid, alcohol, surfactant, acetone, et al), electrochemical cleanings [22,23] (constant current cathodic reduction, electrolytic pencil), laser cleanings [24][25][26][27] [Q-switched Nd: YAG laser, emitting infrared (1064 μm), visible (532 nm) and ultraviolent (355 nm) radiation], Ar ions irradiation cleanings [28], Ar plasma cleanings [29,30], plasma afterglows cleanings [31], UV/Ozone cleanings [32], and so forth. The characteristics of various cleaning methods are also pointed out.…”