著者

高橋 教司

出版者

Japan Society of Corrosion Engineering

雑誌

防蝕技術 (ISSN:00109355)

巻号頁・発行日

vol.10, no.9, pp.398-400, 1961-09-15 (Released:2009-11-25)

参考文献数

1

---

Kraft papers containing various amounts of Cl- and H+ were prepared in laboratry. A piece of the papers was put between two pieces of mild steel and the corrosive was tested under 40°C, 90% R. H. and room temperature. Corrosive action was evaluated by the measurement of rust degree of iron and steel specified by Japanese Industrial Specification.Results obtained were as follows:1) The allowable limit of Cl- is about 0.4mg per 1g of material and beyond the limit, a proportional relation between Cl- concentration and R was established, where R is rust degree of mild steel.2) The allowable limit of H+ concentration is approx. 6 in pH and in acid range, log R is proportional to pH value.