냉연 강판용 고내식 유/무기 하이브리드 코팅 용액 개발
- Alternative Title
- Development of high corrosion-resistant organic/inorganic hybrid coating solution for cold rolled steel
- Abstract
- Currently, a very popular method to reduce the corrosion on zinc is to use chemical conversion coating layers based on Cr+6. However, certain issues must be overcome to use chromium salts due to restrictions resulting from legislation targeting environmental protection.
First study investigates the optimum conditions to form cold rolled steel (SPCC, SPFC590 and SPFC780) using an organic/inorganic solution containing Si. The curing duration for the coating solution was of 1~9 minutes at a temperature of 463 K. Seven types of coating solution were used, and the corrosion resistance improved as the heat treatment time increased. The optimal coating solution was the urethane of 21 wt.%, the SiO2 polysilicate of 7 wt.% and the melamine of 3 wt.%, that is US7M3.
Second study has developed an organic/inorganic hybrid solution by addition of SiO2 polysilicate and Melamine to the urethane. The three types of cold rolled steel were evaluated a corrosion resistance properties by using these solutions. The urethane solution(U) and the urethane solution with SiO2 polysilicate(US7) were generate a lot of corrosion. The urethane solution with SiO2 polysilicate and melamine(US7M3) was excellent in corrosion resistance, regardless of the steel type. In addition, corrosion resistance has been shown to depend on the tensile strength. The appearance of coating by U and US7 solution is bumpy surface, and were a lot of fine defects. US7M3 solution is made a sophisticated molecular cross-linking structure inside the coating, it was a slick surface.
Third study has developed an organic/inorganic hybrid solution according to amount of SiO2 polysilicate, and the amount of melamine is constant. The three types of cold rolled steel were evaluated a corrosion resistance properties by using these solutions. US3M3 and US11M3 solutions were generate a lot of corrosion. US7M3 solution was excellent in corrosion resistance, regardless of the steel type. The appearance of coating by US3M3 and US11M3 solutions were bumpy surface, and were a lot of fine defects. US7M3 solution was made a sophisticated molecular cross-linking structure inside the coating, it was a slick surface.
Other characteristics are exhibited the excellent property for all solutions.
- Issued Date
- 2017
- Awarded Date
- 2017. 2
- Type
- Dissertation
- Keyword
- 하이브리드 코팅 용액
- Publisher
- 부경대학교 대학원
- Affiliation
- 부경대학교 대학원
- Department
- 대학원 기계공학학ㆍ연협동과정
- Advisor
- 남기우
- Table Of Contents
- 제1장 서 론
1.1 연구 배경 2
1.2 유/무기 하이브리드 코팅용액 4
1.3 논문의 구성 15
참고문헌
제2장 SiO2 polysilicate와 Melamine 양의 변화에 따르는 내식성
2.1 서언 23
2.2 재료 및 실험 방법 24
2.2.1 시험편 24
2.2.2 코팅 용액 27
2.2.3 실험 방법 30
2.2.3.1 코팅 용액의 경화 조건 30
2.2.3.2 내식성 평가 30
2.2.3.3 부착성 평가 32
2.2.3.4 내습성 평가 32
2.2.3.5 문지르기 평가 32
2.2.3.6 내굴곡성 평가 32
2.2.3.7 코팅층의 SEM 관찰 33
2.3 결과 및 고찰 34
2.3.1 염수분무에 의한 내식성 34
2.3.2 부착성 50
2.3.3 내비등수성 52
2.3.4 내굴곡성 55
2.3.5 SEM 표면 관찰 57
2.4 결언 61
참고문헌
제3장 Urethane에 SiO2 polysilicate 및 Melamine 첨가에 따르는 내식성
3.1 서언 66
3.2 재료 및 실험 방법 67
3.2.1 시험편 67
3.2.2 코팅 용액 67
3.2.3 실험 방법 69
3.3 결과 및 고찰 69
3.3.1 염수분무에 의한 내식성 69
3.3.2 부착성 85
3.3.3 내비등수성 87
3.3.4 문지르기 91
3.3.5 내굴곡성 93
3.3.6 SEM 표면 관찰 94
3.4 결언 96
참고문헌
제4장 SiO2 polysilicate 양의 변화에 따르는 내식성
4.1 서언 101
4.2 재료 및 실험 방법 102
4.2.1 시험편 102
4.2.2 코팅 용액 102
4.2.3 실험 방법 104
4.3 결과 및 고찰 104
4.3.1 염수 분무에 의한 내식성 104
4.3.2 부착성 119
4.3.3 내비등수성 121
4.3.4 문지르기 125
4.3.5 내굴곡성 127
4.3.6 SEM 표면 관찰 129
4.4 결 언 131
참고문헌
제5장 Melamine 양의 변화에 따르는 내식성
5.1 서언 135
5.2 재료 및 실험 방법 136
5.2.1 시험편 136
5.2.2 코팅 용액 136
5.2.3 실험 방법 138
5.3 결과 및 고찰 138
5.3.1 염수분무에 의한 내식성 138
5.3.2 부착성 153
5.3.3 내비등수성 155
5.3.4 문지르기 157
5.3.5 내굴곡성 158
5.3.6 SEM 표면 관찰 159
5.4 결 언 161
참고문헌
제6장 결 론 165
논문 및 발표 논문
감사의 글
- Degree
- Doctor
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