有機塗膜 加速老化에 따른 外觀變化 및 임피던스 特性
- Alternative Title
- A study of impedance characteristics change with variation appearance of organic coating during accelerating degradation test
- Abstract
- Protective coatings are unique specialty products which represent the most widely used method of corrosion control. The function of a protective coating is to separate two reactive material; substrate of structure, corrosive industrial fumes, liquids, solids, or gases and so on. Organic coatings act as a barrier to prevent either chemical compounds or corrosion current from contacting the substrate. This barrier property decreases because blisters occur by contraction and expansion of resin with effect of the UV, rain, temperature. In this study, when protective coatings were exposed in corrosive condition, the correlation among the results of EIS and optical properties such as gloss and color difference were examined by decreasing barrier property.
Three different coating systems were used as specimens. First coating system was composed of inorganic zinc permanent primer, epoxy coating of BPA-type and polyurethane. Second coating system except inorganic zinc primer. the last, fluoroplastic was used instead of polyurethane to examine about influence of top layer.
These coated metal samples were investigated through acceleration test (NORSOK M 501 cyclic test, QUV test and outdoor weathering test) by using electrochemical impedance spectroscopy(EIS), gloss and color difference.
Atomic force microscope(AFM) and scanning electron microscope(SEM) were used to back up correlationships of optical property and EIS.
- Issued Date
- 2008
- Awarded Date
- 2008. 2
- Type
- Dissertation
- Keyword
- Electrochemical impedance spectroscopy gloss color difference SEM AFM QUV test NORSOK M 501 cyclic test outdoor weathering test
- Publisher
- 부경대학교 대학원
- Alternative Author(s)
- Lee, Sang-Jin
- Affiliation
- 부경대학교 대학원
- Department
- 대학원 공업화학과
- Advisor
- 박진환
- Table Of Contents
- 1. 서론 = 1
2. 이론적 배경 = 2
2.1 유기도막에 의한 방식 기구 = 2
2.2 교류 임피던스 측정 = 5
2.2.1 교류 임피던스 이론 = 5
2.2.2 임피던스의 분석 및 도시 방법 = 17
2.2.3 Electrochemical impedance spectroscopy 측정 = 24
2.2.4 도막 노화에 따른 등가회로 구성 및 의미 = 25
2.3 AFM (Atomic Force Microscope) = 28
2.4 SEM (Scanning Electron Microscopy) = 30
3. 실험방법 = 32
3.1 시험편 제작 = 32
3.2 NORSOK M 501 cyclic test = 34
3.3 QUV test = 36
3.4 옥외폭로시험 = 36
3.5 교류임피던스의 측정 = 38
3.6 색차 및 광택 측정 = 38
4. 결과 및 고찰 = 40
4.1 복합 노화에 따른 교류 임피던스에 의한 특성변화 = 40
4.1.1 임피던스 값의 절대 측정 = 40
4.1.2 도막의 정전 용량 측정 결과 = 45
4.2 광택 및 색차 결과 = 49
4.2.1 광택 결과 = 49
4.2.2 색차 결과 = 53
4.3 AFM 결과 = 57
4.4 SEM 결과 = 61
5. 결론 = 62
References = 64
- Degree
- Master
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