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지하 매설 구조물의 부식과 방식 : 5. 음극방식개론 5. Principle of Cathodic Protection
전경수,고영태,조용범,박경완,이선엽,조성호 한국부식학회 1998 Corrosion Science and Technology Vol.27 No.2
Introductory explanation on cathodic protection(CP) of underground structures is presented. The principle and various types of CP are explained along with the importance of protective coating. Coating reduces the metal surface area exposed to corrosive environment resulting in cut down of the required current for CP. Various field situations which have to be considered during CP design are summarized. Various protection criteria are explained in detail. Emphasis is put on the applicabilty and limit of each criteria in order to help people to select appropriate criteria. Finally, overprotection problem of some metals are explained.
지하 매설 구조물의 부식과 방식 : 6. 희생양극에 의한 음극방식 6. Cathodic Protection by Sacrificial Anodes
전경수,고영태,이선엽 한국부식학회 1998 Corrosion Science and Technology Vol.27 No.4
Cathodic protection utilizing sacrificial anodes(SA) is reviewed. Numerous undeground structures are protected by SA due to its relative simplicity and reliability compared to other protection methods. It is the proper selection and installation of anode that determine the success of protection. Guidelines for anode selection and development are presented followed by the detail description on the characteristics of various anode systems like Mg-, Zn-, and Al-anodes. Test methods of SA arid features of backfill materials are also presented. Regarding design and installation of SA, just a brief description is available in this paper. In depth explanation on the design and installation will be given at a separate paper of this series review.