@article{oai:muroran-it.repo.nii.ac.jp:00009602, author = {境, 昌宏 and SAKAI, Masahiro and 木谷, 光来 and KIYA, Mitsuki and 冨田, 慎太郎 and TOMITA, Shintaro}, issue = {1}, journal = {銅と銅合金, journal of Japan Research Institute for Advanced Copper-base Materials and Technologies}, month = {}, note = {application/pdf, There have been two main categories of pitting corrosion of copper in freshwater; type I and type II. The type I pitting corrosion occurs in the freshwater of relatively high concentration of bicarbonate and the type II in the freshwater of relatively high concentration of sulfate. The aim of this study is to develop an electrochemical test method by which one can reproduce the type I and type II pitting corrosion in artificially synthetic solution in relatively short period. For the type I pitting corrosion, the test solution contains 100mg/L HCO3 -, 10mg/L SO4 2- and 26.6mg/L Cl- and for the type II, the solution contains 10mg/L HCO3 -, 50mg/L SO4 2- and 26.6mg/L Cl-. In the test solutions, immersion of copper tube was carried out for two days, followed by a potentiostatic polarization for 4 weeks at a potential nobler by 100mV than the corrosion potential. The above procedure was found to relatively well reproduce the patinas and pits appearing in the real type I and type II pitting corrosion.}, pages = {124--129}, title = {人工淡水中の電気化学的試験による銅のⅠ型およびⅡ型孔食再現の試み}, volume = {55}, year = {2016}, yomi = {サカイ, マサヒロ and キヤ, ミツキ and トミタ, シンタロウ} }