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부하 방식이 마르텐사이트계 스테인리스강의 응력 부식 특성에 미치는 영향
장현구,한범석,김종집,문한규 대한금속재료학회(대한금속학회) 1989 대한금속·재료학회지 Vol.27 No.7
The response of a martensitic stainless steel, AISI 403, to stress corrosion cracking (SCC) under Mode Ⅰ and Mode Ⅲ loading has been investigated. SCC tests were conducted in 3.5 % NaCl solution using precracked specimens, tempered at 390℃, 520℃ and 610℃. Average crack propagation rates at various stress intensity levels were measured and compared for each mode. Experimental evidence indicates that Mode Ⅰloading exhibits higher crack propagation rate or stronger susceptibility to SCC than Mode Ⅲ loading under all the tempering conditions, which suggests that hydrogen embrittlement is involved in SCC. Furthermore, fractographic study reveals that SCC under both of the loading mode occurs on the notch plane with a predominant mode of intergranular fracture in all of the aforementioned tempering conditions.
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장현구 한국부식학회 1981 Corrosion Science and Technology Vol.10 No.1
Cathodic protection of steel in sea water at elevated temperature was not obtained satisfatctorily by using sacrificial anode such as zinc, because of high corrosion current density. Lead alloy anode containing more than1% silver had increased current stability and that containing more than 2% silver had low anodic consumption rate i. e, below 0.4 Ib/amp-yr. Application of cathodic protection using 2% silver-lead anode to steel structure that has surface area 5000 times larger than anode showed enough protection effects within 24 hours.
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