A.C impedance를 이용한 용융 알루미늄/아연 합금도금강판의 부식거동 연구 = (A) study on electrochemical behaviour of surface treated hot dip aluminium/zinc alloy coated sheet used A.C impedance technique

다국어 초록 (Multilingual Abstract)

The Electrochemical corrosion behaviors of pre-surface treated 55% Al-Zn coated steel sheet was investigated by means of Electrochemical impedance Spectroscopy(E.I.S) in 3.5% NaCl solution.
The test specimens were prepared by product line with no-treated, chromated and organic treated 55% Al-Zn coated steel sheet and were dipped in 3.5 % NaCl solution for 24Hr, 48Hr and 96Hr.
During the dipping in 3.5% NaCl solution, their surface characterization were studied by S.E.M and E.D.X
In impedance test, Chromated 55% Al-Zn coated steel sheet showed better anticorrosion resistance than organic 55% Al-Zn coated steel sheet for 48hr dipping but this results reversed for 96hr dipping in NaCl solution.
In the result of test, organic coated 55% Al-Zn coated steel sheet has good corrosion resistance with electrochemical methode in shot time.
Cyclic Corrosion and salt spray test, which were conventional Corrosion testing Methode and needed for a long time, Showed same results with E.I.S
So, E.I.S is good methode to checking the anti corrosion resistance in the shot time with Quantity analyse.

목차 (Table of Contents)

• 제목
• I 서론 = 2
• II 이론적 배경 = 4
• 2-1 금속의 일반적 부식반응 = 4
• 2-2 용융알루미늄/아연 합금도금강판의 부식거동 = 5
• 2-3 Chromated 용융알루미늄/아연 합금도금강판의 방식거동 = 8
• 2-4 Organic 용융알루미늄/아연 합금도금강판의 방식거동 = 10
• 2-5 전기화학적 부식시험 = 13
• 3. 실험방법. = 32
• 3-1 시편제작 및 실험조건 = 32
• 4. 실험결과 및 고찰 = 37
• 4-1 동전위분극실험결과 = 37
• 4-2 교류 Impedance 실험결과 = 39
• 4-3 CCT 및 SST 시험결과 = 62
• 5. 결론 = 63
• 6. 참고문헌 = 65
• 7. ABSTRACT = 66