采用模拟闭塞电池及动电位扫描法研究堆外模拟辐照与未辐照的Zr-4合金在水中的缝隙腐蚀敏感性。结果表明，当电流通过闭塞区时，溶液pH值随时间下降，在闭塞区内Cl-的浓度随时间呈线性增大，而且经辐照的Zr-4合金闭塞区溶液的pH下降及Cl-增浓均比未经辐照的显著。动电位扫描法测Zr-4合金模拟闭塞区溶液中的阳极极化曲线和线性极化的结果与模拟闭塞电池法的结果基本一致，证实了经辐照的zr-4合金的缝隙腐蚀敏感性比未经辐照的明显增大。

采用控制电位下的恒载荷拉伸试验测得LC4铝合金在30℃、50℃、90℃的0.5mol/L Nacl水溶液（pH=7）中的应力腐蚀临界破裂电位Ecri分别为-720mv、-760mv、850mV（SCE）。体系电位负于Ecri时不发生应力腐蚀破裂。Ecri随介质温度T升高而向负方向移动，Ecri与T大体呈直线关系：Ecri=-655-2.17T（mV）。用改进的模拟闭塞电池研究了裂纹尖端化学状态的变化：当通入闭塞区的阳极电流密度为1mA/cm2时，其溶液pH值从7降至3.3，Cl-浓集倍数高达4。断口呈典型的沿晶应力腐蚀开裂形貌。

It is observed by scanniag tunneling microscopy (STM) that the adsorbed Benzotriazole (BTA) on copper is long in shape and has an irregular rectangle. The growth of BTA on copper is in the form of polymeric chain and mainly in one dimension rather than two dimensions The copper surface covered by BTA becomes flatter, smoother and the roughness was smaller than that of bare copper, so the corrosion is largely decreased. However, many grooves can be seen between BTA polymeric chains in which corrosion may exist to a degree.

Techniques are developed for studying the mechanism of localized corrosion and protective measures against such corrosion are suggested. The pH values and composition of the occluded sol-ution at different propagation stages are determined. Measurements of the critical pH value and cor-rosion rate inside the occluded cells are conducted. Potential-pH diagrams depicting kinetic and thermodynamic behaviors of occluded cell corrosion are being established. The mechanism of inhibi-tion of pitting and stress corrosion cracking have also been investigated.

This paper describes a study on the corrosion behaviour of archaeological bronze in simulated groundwater by means of a simulated occluded cell. The study revealed migration, enrichment and deposition patterns of ions in the environment and the cations produced by anodic dissolution during lacalised corrosion of bronze. The cycle voltametry technique was utilised for the first time on the study of electrochemical behaviour of the bronze/simulated occluded solution interface. The potential and current peaks of oxidation-reduction at the cathode and anode in the occluded solutions at various time intervals facilitated a study of the corrosion products formation processes and their formation speeds.