해수 중 펄스 전착 프로세스 의해 제작한 석회질 피막의 결정구조 제어 및 특성 평가

• Published in: Biuletyn Uniejowski Vol. 52; no. 2; pp. 103 - 110
• Main Authors: 박준무(Jun-Mu Park), 이승효(Seung-Hyo Lee)
• Format: Journal Article
• Language: Korean
• Published: 한국표면공학회 2019
• Subjects: 기계공학; Calcareous deposit films; Pulse electrodeposition process; Aragonite crystal structure; Seawater
• ISSN: 1225-8024; 2299-8403; 2288-8403
• DOI: 10.5695/JKISE.2019.52.2.103

As an anti-corrosion method in seawater, cathodic protection is widely recognized as the most effective and technically appropriate corrosion prevention methodology for marine structures against harsh corrosive environment. When applying the cathodic protection in seawater, the surface of the metal facilities the formation of compounds of $CaCO_3$ and $Mg(OH)_2$. These mixed compounds are generally called 'calcareous deposits'. This layer functions as a barrier against the corrosive environment and functions to further inhibit the corrosion process and then leading to a decrease in current demand for cathodic protection. However, calcareous deposit films are partially formed on the surface of the cathode and there are some difficulties to maintain both a corrosion resistance for a long period of time and a strong adhesion between deposits and base metal. In this study, the pulse electrodeposition process was applied to improve adhesion and corrosion resistance of the calcareous deposit films, and to solve the problem of hydrogen embrittlement at high current density. The uniform and compact calcareous deposit films were prepared by pulse electrodeposition process, and their properties were characterized using various surface analytical techniques together with electrochemical methods.