페라이트계 스테인리스강의 고온염 부식특성에 관한 연구 (High Temperature Salt Corrosion Property of Ferritic Stainless Steels)

서지정보

· 발행기관 : 한국마린엔지니어링학회
· 수록지 정보 : 한국마린엔지니어링학회지 / 33권 / 6호 / 860 ~ 866페이지
· 저자명 : 송전영, 박중철, 안용식

초록

It is very important to choose optimal material having good corrosion
resistance and capabilities for the part materials such as the automotive exhaust
system under a hot salt corrosion atmosphere. Generally, two types of corrosion come
into the automotive exhaust system. One is ‘Condensate Corrosion’, which is occurred
by exhaust gas condensate formed at the inner surface of exhaust system heated up
during driving, which results in the acid condensate pitting. The other is ‘High
Temperature Salt Corrosion’ occurring from the interaction between the chloride ion
coming from salt at the seaside district or snow salt and the outer surface of exhaust
system. By the corrosion attack, the main muffler is firstly damaged and the life cycle
of an automobile is significantly decreased. It has been investigated that the hot salt
corrosion properties of a STS 409L and 436L ferritic stainless steels which are
well-known for the materials of the automotive exhaust system. In addition, the
corrosion properties of hot dip aluminum coated STS 409L have been compared with
uncoated steels. Aluminum coated STS 409L showed a superior corrosion resistance
than uncoated STS 409L, and futhermore showed a better corrosion resistance than a
STS 436L, which is an expensive ferritic stainless steel having a excellent corrosion
resistance caused from more chromium content of an alloying element.

영어초록

It is very important to choose optimal material having good corrosion
resistance and capabilities for the part materials such as the automotive exhaust
system under a hot salt corrosion atmosphere. Generally, two types of corrosion come
into the automotive exhaust system. One is ‘Condensate Corrosion’, which is occurred
by exhaust gas condensate formed at the inner surface of exhaust system heated up
during driving, which results in the acid condensate pitting. The other is ‘High
Temperature Salt Corrosion’ occurring from the interaction between the chloride ion
coming from salt at the seaside district or snow salt and the outer surface of exhaust
system. By the corrosion attack, the main muffler is firstly damaged and the life cycle
of an automobile is significantly decreased. It has been investigated that the hot salt
corrosion properties of a STS 409L and 436L ferritic stainless steels which are
well-known for the materials of the automotive exhaust system. In addition, the
corrosion properties of hot dip aluminum coated STS 409L have been compared with
uncoated steels. Aluminum coated STS 409L showed a superior corrosion resistance
than uncoated STS 409L, and futhermore showed a better corrosion resistance than a
STS 436L, which is an expensive ferritic stainless steel having a excellent corrosion
resistance caused from more chromium content of an alloying element.

참고자료

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