Title of article :
EROSION-CORROSION BEHAVIOR OF 316-SS IN SEAWATER SIMULATED ENVIRONMENT AT VARIOUS IMPINGEMENT ANGLES
Author/Authors :
Ghasemi, H.M. university of tehran - School of Metallurgy and Materials Engineering, تهران, ايران , Karimi, M. university of tehran - school of chemistry, تهران, ايران , Pasha, A. Iranian Research Institute of Petroleum Industry - Corrosion Department, ايران , Pasha, A. university of tehran - School of Metallurgy and Materials Engineering, تهران, ايران , Abedini, M. tehran university of medical sciences tums - Children’s Medical Center, School of Medicine - Laboratory of Microbiology, تهران, ايران
Abstract :
The effect of sand erosion on corrosion behavior of 316-stainless steel in a simulated seawater environment was studied in a jet slurry apparatus. 10 wt.% SiO2 particles with average size of 250-500 μm were used as the erodent in a 3.5 wt.% NaCl solution. The tests were carried out in accordance with ASTM G 119 at three slurry impinging angles of 25°, 55°, and 90° at an impinging velocity of 6 m/s. Pure erosion, pure corrosion and erosion–corrosion tests were performed and the synergistic effect was calculated. Positive synergistic effect was observed at all examined impinging angles. The results showed that the highest pure erosion and erosion-corrosion rate was occurred at an impingement angle of 25°. The results also showed that corrosion increased the erosion rate by about 57, 37 and 57 percent at the impingement angles of 25, 55 and 90 degree, respectively. Scanning electron micrographs of the eroded surfaces showed higher plastic deformation and cutting at the impinging angle of 25°.
Keywords :
Erosion , corrosion , 316 stainless steel , Impinging angle , Synergistic effect
Journal title :
International Journal of Mechanical and Materials Engineering
Journal title :
International Journal of Mechanical and Materials Engineering
