Abstract
A test method for the evaluation of ethanol SCC of carbon steels was standardized by NACE International as NACE TM0111. It is a procedure that employs the use of slow strain rate (SSR) testing techniques using either smooth or notched specimens that are pulled to failure in an ethanolic test environment (e.g. fuel grade ethanol or ethanol fuel blend). This method provides standardized approaches to testing for ethanol SCC along with guidance for selection of test conditions and evaluation of SSR test data. This paper reviews the standard test method per NACE TM0111 for ethanol SCC. It also provides the results of a recently completed round robin test program involving multiple testing laboratories using smooth and notched specimens in a standardized environment. The paper reviews the interpretation of this multi-laboratory data, including the reproducibility of the round robin data and potential sources of scatter.
