caa a22 4500 475816188 CHVBK 20180406123810.0 cr unu---uuuuu 170329e20000501xx s 000 0 eng 10.1023/A:1003908219469 doi (NATIONALLICENCE)springer-10.1023/A:1003908219469 Application of EIS to the initial stages of atmospheric zinc corrosion [Elektronische Daten] [S.C. Chung, S.L. Sung, C.C. Hsien, H.C. Shih] This paper reports an experimental study of the initial stage of atmospheric zinc corrosion using ex situ electrochemical impedance spectroscopy (EIS) in methanol electrolyte. Compared with the traditional techniques for studying atmospheric corrosion, such as gravimetry, the EIS technique significantly reduced the exposure time for detectable corrosion at any relative humidity from several days to a few hours. The samples were first exposed to synthetic atmospheres with careful control of O2 and CO2 concentrations, relative humidity and temperature. EIS was then used to measure the polarization resistance (R p) of the exposed samples. The corrosion products were analysed by a combination of grazing-angle X-ray diffraction, Fourier transform infrared spectroscopy and photoelectron spectroscopy. Several interesting phenomena occurring in the initial stage of corrosion were demonstrated by studying the electrochemical properties of the surface layer formed on the zinc. At high values of relative humidity (RH 95-100%), with CO2 > 40 ppm, the R p of the surface film formed increased monotonically with time and relative humidity. At intermediate values of relative humidity (RH 50-85%) in the presence of CO2 (40-500 ppm), R p first increased with time, reached a maximum, then fell from the maximum value before again rising slowly. A brief description of the mechanism of atmospheric zinc corrosion is proposed. Kluwer Academic Publishers, 2000 atmospheric corrosion nationallicence EIS nationallicence initial stage nationallicence zinc nationallicence Chung S.C. Department of Materials Science and Engineering, National Tsing Hua University, 300, Hsinchu, Taiwan, R.O.C aut Sung S.L. Department of Materials Science and Engineering, National Tsing Hua University, 300, Hsinchu, Taiwan, R.O.C aut Hsien C.C. Materials Research Laboratories, Industrial Technology Research Institute, Chutung, 310, Hsinchu, Taiwan, R.O.C aut Shih H.C. Department of Materials Science and Engineering, National Tsing Hua University, 300, Hsinchu, Taiwan, R.O.C aut Journal of Applied Electrochemistry Kluwer Academic Publishers 30/5(2000-05-01), 607-615 0021-891X 30:5<607 2000 30 10800 https://doi.org/10.1023/A:1003908219469 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1003908219469 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chung S.C. Department of Materials Science and Engineering, National Tsing Hua University, 300, Hsinchu, Taiwan, R.O.C aut NATIONALLICENCE 700 1- Sung S.L. Department of Materials Science and Engineering, National Tsing Hua University, 300, Hsinchu, Taiwan, R.O.C aut NATIONALLICENCE 700 1- Hsien C.C. Materials Research Laboratories, Industrial Technology Research Institute, Chutung, 310, Hsinchu, Taiwan, R.O.C aut NATIONALLICENCE 700 1- Shih H.C. Department of Materials Science and Engineering, National Tsing Hua University, 300, Hsinchu, Taiwan, R.O.C aut NATIONALLICENCE 773 0- Journal of Applied Electrochemistry Kluwer Academic Publishers 30/5(2000-05-01), 607-615 0021-891X 30:5<607 2000 30 10800 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer