ゼラチン滴法による薄膜防錆油の発錆試驗

Abstract

The existence and location of anodes and cathodes in an oxygen concentration corrosion cell within a drop of gelatine, which is established on the rust preventive oil film on the steel surface, can be demonstrated by the change in color of indicators such as phenolphthalein and potassium ferricyanide contained in the gelatine. The authors applied those phenomena to the test of the rust preventive oil film on the steel surface; a part of the result is shown by the microscopic photographs taken by the authors.