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由酸浸试验速率测定的酸浸滞后是镀锡板的一种现象,此现象与锡罐头里层耐蚀性的降低有关。它反映了钢板表面晶界氧化物的出现。这些在对铁索体晶粒不氧化而对晶界氧化的气氛中进行罩式退火时形成的。检验酸浸滞后的常用方法为测定未镀锡或脱锡的钢板在90℃6当量盐酸中的失重速度或氢气放出的速度。已发现钢试样在盐酸中对参比电极的腐蚀电位也能用作酸浸滞后的快速,明确的试验。在未镀锡原板上晶界氧化物可以直接用金相显微镜检验出来。此项研究是根据内陆钢铁公司铠装研究基金会所提的课题并结合美国罐头公司的一些研究结果开展的。
Acid leaching, as measured by acid pickling rate, is a phenomenon of tinplate, a phenomenon that is related to a decrease in corrosion resistance of the tin can layer. It reflects the appearance of grain boundary oxides on the steel surface. These are formed during shell annealing in an atmosphere in which ferrite bulk grains are not oxidized and grain boundary oxidized. A common method of testing for acid leaching is to determine the rate of weight loss or rate of hydrogen evolution in a six-equivalent solution of hydrochloric acid at 90 ° C for non-tinned or tin-removed steel. It has been found that the corrosion potential of a steel sample in hydrochloric acid against a reference electrode can also be used as a rapid and definitive test after acid leaching. In the non-tin plate on the original grain boundary oxide can be directly examined by a metallurgical microscope. The study was based on topics raised by the Inland Iron and Steel Research Armored Research Foundation and in conjunction with the results of some studies conducted by the U.S. Canner Company.