| 摘要 |
Provided is an SCC test method whereby an SCC environment in bio-alcohol can be simulated in a laboratory and a steel material in a bio-alcohol environment can be evaluated in a short time. The stress corrosion cracking test method for alcohol environments is a test whereby the stress corrosion cracking susceptibility of a steel material in alcohol is evaluated, said method being characterized by: cells covering a uniaxial tensile test piece of the steel material being filled with an alcohol solution including at least 0.1 mmol/L but less than 40 mmol/L carboxylic acid, at least 0.05 mg/L but less than 300 mg/L chloride ions, and at least 0.1 vol.% but less than 5 vol.% water; and applying, in the tensile axis direction of the uniaxial tensile test piece and at a frequency of 2.0 × 10-5-2.0 × 10-2 Hz, a fluctuating stress to the uniaxial tensile test piece, said fluctuating stress having a maximum stress of at least the yield point at the test solution temperature but less than the tensile strength and a minimum stress of 0%-90% of said yield point. |
