Ⅰ. INTRODUCTION
In fourth semester most of our department students attend the subject of mechanical manufacturing practice and we have made a bolt by ourselves. But the process was not a soft job. A bolt and nut is used diversely but it seemed that we don't know much about a importance and manufacture of bolts.
A bolt is a threaded fastener used in industry to make two or more mechanical
corrosion environment and corrosion difference inquires happened reason.
Consider how take advantage of Material in state that is more better in our real life.
TheoryA
kind of the corrosion
- General Corrosion
- Galvanic Corrosion
- Crevice Corrosion
- Pitting Corrosion
- Intergranular Corrosion
- Erosion Corrosion
- Selective Leaching
- Stress Corrosion
-
corrosion pits)과 같은 거친 표면을 형성한다.
surface corrosion
2)이질금속 간 부식=전식부식, 동전기 부식(galvanic corrosion)
흔한 부식의 형태로서 어느 때이든지 아래의 두 가지 상태에 있으면 항상 발생한다.
(1) 두 개의 다른 금속이 전자흐름이 가능하게
Experiment purpose
• Understanding electrochemical test method and principle
• Learning how to evaluate the corrosion characteristics
• Examination the influence of alloy addition on the corrosion
resistance of aluminum for a Al-air Battery.
1. 실험목표
• 전기화학 테스트 방법과 원리를 이해한다.
• 부식특성을 평가하는 방법을 배운다.
• Al-air Battery에서 Al의 부식저항에서 합금의 영향을 배운다.
2.원리
Corrosion
금속이 외부로부터의 화학적 작용에 의해 소모되어 가는 현상
Electrochemical nature of aqueous corrosion
•