메뉴 건너뛰기
.. 내서재 .. 알림
소속 기관/학교 인증
인증하면 논문, 학술자료 등을  무료로 열람할 수 있어요.
한국대학교, 누리자동차, 시립도서관 등 나의 기관을 확인해보세요
(국내 대학 90% 이상 구독 중)
로그인 회원가입 고객센터 ENG
주제분류

추천
검색

논문 기본 정보

자료유형
학술저널
저자정보
저널정보
한국부식방식학회 Corrosion Science and Technology Corrosion Science and Technology 제15권 제2호
발행연도
2016.1
수록면
84 - 91 (8page)

이용수

표지
📌
연구주제
📖
연구배경
🔬
연구방법
🏆
연구결과
AI에게 요청하기
추천
검색

초록· 키워드

오류제보하기
The transport and deposition of corrosion products in pressurized water nuclear reactor (PWR) steam generatorshave led to corrosion (SCC, denting etc.) problems. Lancing, mechanical cleaning and chemical cleaninghave been used to reduce these problems. The methods of lancing and mechanical cleaning have limitationsin removing corrosion products due to the structure of steam generator tubes. But high temperature chemicalcleaning (HTCC) with EDTA is the most effective method to remove corrosion products regardless of thestructure. However, EDTA in chemical cleaning aqueous solution and chemical cleaning environments affectsthe integrity of materials used in steam generators. The nuclear power plants have to perform the pre-test(also called as qualification test (QT)) that confirms the effect on the integrity of materials after HTCC. This is one of the series studies that assess the effect, and this study determines the effects of 20 % EDTAaqueous solution on defective tubes in high temperature chemical cleaning environments. The depth andmagnitude of defects in steam generator (SG) tubes were measured by eddy current test (ECT) signals. Surface analysis and magnitude of defects were performed by using SEM/EDS. Corrosion rate was assessedby weight loss of specimens. The ECT signals (potential and depth %) of defective tubes increased marginally. But the lengths of defects, oxides on the surface and weights of specimens did not change. The averagecorrosion rate of standard corrosion specimens was negligible. But the surfaces on specimens showed tracesof etching. The depth of etching showed a range on the nanometer. After comprehensive evaluation ofall the results, it is concluded that 20 % EDTA aqueous solution in high temperature chemical cleaningenvironments does not have a negative effect on defective tubes.

목차

등록된 정보가 없습니다.

참고문헌 (5)

참고문헌 신청

함께 읽어보면 좋을 논문

논문 유사도에 따라 DBpia 가 추천하는 논문입니다. 함께 보면 좋을 연관 논문을 확인해보세요!

이 논문의 저자 정보

최근 본 자료

전체보기

댓글(0)

0