论文部分内容阅读
本文对钛涂二氧化钌电极在海水里作为阴极保护的不溶性阳极进行了研究。这种电极是用RuCl_3涂在钛基体上,并经热分解而制成的。对该电极在NaCl、Na_2SO_4溶液和人造海水里的阳极极化曲线进行了测量。用恒电流电解法进行了试验,并用扫描电子显微镜进行了观察。在含有Cl~-的稀溶液里的阳极极化曲线上,观察到有一个特征性的屈折点。这是由于二氧化钌电极的氧过电位要比铂等低得多的缘故。在恒电流电解时,RuO_2电极在高电流密度(例如40安/分米~2)下被腐蚀,据认为,此现象是由于电极电位升高,RuO_2涂层变得不稳定所致。
In this paper, titanium dioxide coated ruthenium dioxide electrode in seawater as cathodic protection insoluble anode was studied. This electrode is coated with RuCl_3 titanium substrate, and made by thermal decomposition. The anodic polarization curve of the electrode in NaCl, Na2SO4 solution and artificial seawater was measured. The experiment was carried out by galvanostatic electrolysis and observed with a scanning electron microscope. A characteristic inflection point was observed on the anodic polarization curves in dilute solutions containing Cl ~ -. This is due to the fact that the O2 overpotential of the ruthenium dioxide electrode is much lower than platinum. At constant current electrolysis, the RuO 2 electrode is corroded at high current densities (eg 40 A / dm 2), which is believed to be due to the increased electrode potential and the RuO 2 coating becoming unstable.