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论文类型：期刊论文

发表时间：2013-06-01

发表刊物：MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION

收录刊物：SCIE、EI、Scopus

卷号：64

期号：6

页面范围：472-477

ISSN号：0947-5117

关键字：cathodic protection; modelling study; shielding

摘要：Two kinds of cathodic shielding phenomena of the sacrificial anode cathodic protection systems, which are caused by a metal barrier, were investigated by numerical simulations and experiments in this paper. The results show that if the cathode current is completely shielded by the barrier, one side of the barrier would act as the anode leading to the occurrence of serious corrosion, while the protected components and the other side of the barrier would act as cathode being protected. However, if the cathode current is only partially shielded, both the metal components and the barrier would act as cathodes. Furthermore, this non-full shielding effect of the barrier would be weakening by decreasing the mass transfer resistance between the sacrificial anode and the cathodically protected component.