MS in Civil Engineering (M.S.C.E.)
Degree Granting Department
Civil and Environmental Engineering
Christopher L. Alexander, Ph.D.
Alberto A. Sagüés, Ph.D.
Michael Cai Wang, Ph.D.
Cut Edge, SVET, Chloride, Crevice Corrosion
The electrochemical behavior of aluminized steel is investigated to determine the corrosion performance of coating deficiencies generated within the lock seams during the fabrication of aluminized steel corrugated pipe. Electrochemical techniques and visual and profilometric analysis are used to assess the ability of the aluminum and zinc coating to provide sufficient galvanic protection to the underlying steel in the presence of a crevice. Also, Crevice coupons and lock-seam samples were used in this investigation in different environmental conditions simulating natural water conditions to relate the corrosion rate with the level of protection that the coating will provide. In addition, a model was developed to identify the influence of the confined geometry of the lock seam on the corrosion rates at a defect location. The results have shown that defects in the aluminum coating can act as initiation sites for the corrosion of the steel. However, defects located external to the lock seam may corrode at higher rates than those within the lock seams due to the limited availability of oxygen.
Scholar Commons Citation
Al Yaarubi, Mohammed, "Influence of Coating Defects Within the Lock Seams on the Corrosion Performance of Aluminized Steel Drainage Pipes" (2021). Graduate Theses and Dissertations.