عنوان مقاله [English]
Cooling waters are used in many industries for lowering the working temperature of the machineries or parts. Corrosion inhibitors are used to mitigate corrosion of such metallic parts in contact with cooling water. In case these machineries are under stress they may fail due to SCC. Therefore it is necessary to check the susceptibility of metallic parts to SCC in cooling water. The inhibition effect of sodium citrate on SCC of carbon steel in SCW is investigated using SSRT. The stress-strain curves and potential changes showed that citrate ions increase time to failure of carbon steel in presence of 500 ppm chloride ions. Moreover it was observed that the presence of citrate ion is not effective at high concentration of chloride ions i.e. 1000 ppm. The results showed that in presence of citrate ion the toughness was decreased probably due to the prevention of pitting which may increase the elongation.
 T. Shibata, "Passivity breakdown and stress corrosion cracking of stainless steel", Corrosion Science, vol. 49, pp. 20-30, 2007.
 M. Breimesser, S. Ritter, H.-P. Seifert, T. Suter, and S. Virtanen, "Application of electrochemical noise to monitor stress corrosion cracking of stainless steel in tetrathionate solution under constant load", Corrosion Science, vol. 63, pp. 129-139, 2012.
 A. Torres-Islas and J. Gonzalez-Rodriguez,"Effect of electrochemical potential and solution concentration on the SCC behaviour of X-70 pipeline steel in NaHCO3", International Journal of Electrochemical Science, vol. 4, pp. 640-53, 2009.
 G. Du, J. Li, W. Wang, C. Jiang, and S. Song, "Detection and characterization of stress-corrosion cracking on 304 stainless steel by electrochemical noise and acoustic emission techniques", Corrosion Science, vol. 53, pp. 2918-2926, 2011.
 J. Kovac, C. Alaux, T. J. Marrow, E. Govekar, and A. Legat, "Correlations of electrochemical noise, acoustic emission and complementary monitoring techniques during intergranular stress-corrosion cracking of austenitic stainless steel", Corrosion Science, vol. 52, pp. 2015-2025, 2010.
 N. K. Allam and E. A. Ashour, "Electrochemical and stress corrosion cracking behavior of 67Cu–33Zn alloy in aqueous electrolytes containing chloride and nitrite ions: Effect of di-sodium hydrogen phosphate (DSHP)", Materials Science and Engineering: B, vol. 156, pp. 84-89, 2009.
 A. Al-Sabagh, N. Nasser, O. E. El-Azabawy, and A. E. El-Tabey, "Corrosion inhibition behavior of new synthesized nonionic surfactants based on amino acid on carbon steel in acid media", Journal of Molecular Liquids, vol. 219, pp. 1078-1088, 2016.
 S. Muralidharan, V. Saraswathy, S. M. Nima, and N. Palaniswamy, "Evaluation of a composite corrosion inhibiting admixtures and its performance in Portland pozzolana cement", Materials Chemistry and Physics, vol. 86, pp. 298-306, 2004.
 A. Standard, "E8-04",", Standard Test Methods for Tension Testing of Metallic Materials", Annual Book of ASTM Standards, vol. 3,2004.
 N. Cansever, A. Ca̧kır, and M. Ürgen, "Inhibition of stress corrosion cracking of aisi 304stainless steel by molybdate ions at elevated temperaturesunder salt crust", Corrosion Science, vol. 41, pp. 1289-1303, 1999.