模拟典型海洋大气环境中Q235钢初期腐蚀特征研究.pdfVIP

ABSTRACT It has important theoretical significance and extensive application value to study the process of atmospheric corrosion of carbon steel and understand the corrosion characteristics in different environment for reasonable selection of materials, providing the corresponding protective measures, prolonging the service life of equipments and components. In this paper, detection system is designed to study the atmospheric corrosion of Q235 steel. Electrochemical noise resistances acquired in different simulated atmosphere were used to study corrosion behaviors of Q235 steel. The results showed - - that the effect of the main ions which [Cl ]=0.1 mol/L, [NO3 ]=0.01 mol/L, [SO42-]=0.01 mol/L, the corrosion rate of Q235 steel in the three kinds of simulation environment increases with the increasing of the relative humidity respectively. As we all know, the relative humidity would affect the thickness of the liquid film thickness on the surface of the samples, Carbon steel wire beam electrode were used to explore the heterogeneous distribution of the specimen within different liquid film thickness. With the application of atmospheric corrosion of Q235 steel detection system, this paper presents the application of wavelet noise resistance (Rcd) acquired from electrochemical noise analysis to evaluate the early formation and development law of corrosion products within different simulated marine atmospheric environments. The experimental results from noise resistances (R ) showed that the corrosion rate n increased with the exposure time. The experimental