鋼の強腐蝕に就て

概要

論文の詳細を見る
Method of strong etching has been developed in order to investigate the homogeneity of steel. Nippon-Gakuzyutu-Sinkokai (Japan Society for Scientific Promotion) and Heiki-Kogyokai (Munition Industries Association) have rently determined the standard method of the strong etching, of which the research is rather phenomenological. On reexamining it, the following results were revealed. When an electrolytic etching is adopted as a method, it is possible to obtain the same result as in the heretofore method with in a short time at ordinary temperature. Purity of acid, heat treatment, quality of the material tested, forging ratio, etc. are counted among factors influencing the result of etching. Pittings formed after etching are due to dissolution of sulphides and some oxides liable to be attacked by acid. Sil cates have rather little effect. Sulphides even if in small size, conglomerate into large pittings. The first means to improve the result of strong etching is nothing but desulphidation.
社団法人日本鉄鋼協会の論文
1943-04-25