Measurement of Erosion-corrosion Synergism With a Slurry Wear Test Apparatus.
Proc Int'l Conf Wear/Mat Houston Texas, 4/5-9/87 Am Soc Mech Eng New York, New York, 1987 2:777-786
This paper describes a slurry wear test recently developed by the Bureau of Mines for the measurement of wear rates and electrochemical corrosion rates during slurry wear to establish relationships between erosion and corrosion of metal specimens. Slurries of silica sand and aqueous solutions were continuously fed into the test chamber, where they abraded and corroded the test specimens--a low-alloy steel, a stainless steel, and a wear- resistant low-alloy steel. Three types of tests were conducted to determine the total erosive-corrosive wear rate, the wear rate due to erosion only, and the electrochemical corrosion rate. The total wear rate was determined from the weight losses and densities and repoted in units of volume losses per unit of time. The wear rate due to erosion only was determined while cathodically protecting the specimens. The electrochemical corrosion rate was determined by using polarization scans with the test specimen as the working electrode during slurry wear tests. The test parameters included temperature, solids concentration, and impeller speed. The test results showed that the combined effects of erosion and corrosion resulted in total wear rates that were much greater than the additive effects of each process taken aone, thus showing a strong synergism between erosion and corrosion.
Proc. Int'l Conf. Wear/Mat., Houston, Texas, 4/5-9/87. Am. Soc. Mech. Eng., New York, New York, V.2, '87, 777-786