Monitoring Uniform Corrosion of Storage Tank Bottom Steel by Acoustic Emission technique

作者：Bi, Haisheng^*; Hu, Dedong; Li, Zili; Niu, Qingwei; Toku-Gyamerah, Isaac; Chen, Jianfei

来源：International Journal of Electrochemical Science, 2015, 10(9): 6946-6958.

• Storage tank
• Uniform corrosion
• Acoustic emission
• Electrochemical polarization
• Wavelet transform

Measurements of uniform corrosion of atmospheric metal storage tank bottom steel specimens by acoustic emission (AE) and electrochemical methods were carried out simultaneously in diluted sulfuric acid (H2SO4) solution (pH=4.5). The potentiostatic polarization measurements indicated that AE activity was positive correlation with the corrosion level. AE signal generated from uniform corrosion was analyzed by characteristic parameters in time domain and spectrum in frequency domain respectively, and further time-frequency local analysis was presented using the Gabor Wavelet transform (WT). The result shows that the AE technique is very sensitive to tank bottom steel uniform corrosion, corrosion products' deposits and movement, so that AE activity can be used to represent the corrosion rate. These conclusions will be helpful for explaining and evaluating the on-site storage tank bottom AE testing result.

• 出版日期2015-9
• 单位青岛科技大学; 中国石油大学（北京）