Author/Authors :
كاكويي، سعيد نويسنده Kakooei, S , طاهري، حسين نويسنده Corrosion Engineering Group, Engineering Faculty, Kish University, Kish Island, Iran Taheri, Hossein , اسماعيل، مختار چه نويسنده Center For Corrosion Research, Mechanical Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak, Malaysia Ismail, Mokhtar Che , دولتي، ابوالقاسم نويسنده Department of Materials Engineering, Sharif University of Technology, Tehran, Iran Dolati, Abolghasem
Abstract :
Environmental cracking in the presence of wet hydrogen sulfide (H2S) is a serious problem in the chemical or petrochemical industries. This phenomenon causes major failure for pipeline steels transmitting sour gas/oil and steel tanks storing liquefied petroleum gas (LPG). The effect of environmental parameters was studied for HSLA steels (X70, A516) in sour simulated solution. The dissolved H2S was created by chemical reactions in solution. Na2S•9H2O was chosen as test material to replace H2S because of the toxicity of H2S. The specimens were immersed into synthetic seawater saturated with H2S where corrosion behavior was evaluated by potentiodynamic polarization, weight loss, and scanning electron microscopy (SEM). The results showed that the presence of alloying elements can change the corrosion rate in inspecting steels.
