著者

山田 啓之 岡本 常義

出版者

一般社団法人 軽金属学会

雑誌

軽金属 (ISSN:04515994)

巻号頁・発行日

vol.21, no.6, pp.405-412, 1971-06-30 (Released:2008-07-23)

参考文献数

8

被引用文献数

1

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The effects of the purity of water upon The formation and corrosion resistance of boehmite film were studied with electron microscope and electron microprobe analyzer.The following results were obtained.(1) Boehmite films formed in city water containing various kinds of impurities had smaller thickness and lower corrosion resistance and were more blackish as compared with those formed in deionized water.(2) The composition and corrosion resistance of boehmite films formed in deionized water were nearly constant independent of the value of specific resistivity, when its value was not lower than 100, 000 Ωcm.(3) As the results of study with electron microprobe analyzer, it was concluded that the boehmite films formed in city water containing Si and Ca elements showed blackening and the decrease in film thickness and corrosion resistance, all of which chiefly depended upon SiO2, but scarcely upon CaCO3.