The changing topography of corroding mild steel surfaces in seawater

Jeffrey, R.; Melchers, Robert E.

doi:10.1016/j.corsci.2006.11.003

Cited by 99 publications

(63 citation statements)

References 16 publications

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“…This is due to the absorption of water molecules and chloride ions on the steel surface causing breakdown of the oxide film. Corrosion mechanisms retrieved from these results are in agreement with the interpretation provided by others [12,13]. Increasing the surface roughness shifted the corrosion potential to more noble direction; however, the corrosion current density decreased.…”

Section: Discussionsupporting

confidence: 81%

Corrosion of mild steel and 316L austenitic stainless steel with different surface roughness in sodium chloride saline solutions

Abosrra

Ashour

Mitchell

et al. 2017

WIT Transactions on State-of-the-Art in Science and Engineering

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The corrosion behaviour of mild steel and 316L austenitic stainless steel was investigated in saline solution containing 1 and 3% NaCl. Specimens with surface roughness of 200, 600 grit emery paper and 1 μm diamond paste were investigated. The anodic polarization measurement technique was performed at a scan rate of 1 mV/s for a fixed period of 1 hour. Experimental results revealed that chloride ions have a significant effect on the corrosion behaviour of both steels as expected. As the surface roughness of 316L stainless steel increased, the breakdown potential (Ebreak), the free corrosion potential (E corr ) and the width of passivity decreased, hence corrosion rate increased. However, in the case of mild steel specimens, improving surface finish led to shifts in corrosion potential to more noble states and increased the corrosion rate. Metallographic examination of corroded specimens after electrochemical corrosion tests confirmed that the breakdown of the passive region was due to pitting corrosion.

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Section: Discussionsupporting

confidence: 81%

Corrosion of mild steel and 316L austenitic stainless steel with different surface roughness in sodium chloride saline solutions

Abosrra

Ashour

Mitchell

et al. 2017

WIT Transactions on State-of-the-Art in Science and Engineering

View full text Add to dashboard Cite

show abstract

“…This is due to the absorption of water molecules and chloride ions on the steel surface causing breakdown of the oxide film. Corrosion mechanisms retrieved from these results are in agreement with the interpretation provided by others [12,13]. Increasing the surface roughness shifted the corrosion potential in a more noble direction; however the corrosion current density decreased.…”

Section: Discussionsupporting

confidence: 81%

Corrosion of mild steel and 316L austenitic stainless steel with different surface roughness in sodium chloride saline solutions

Abosrra¹,

Ashour²,

Mitchell³

et al. 2009

Simulation of Electrochemical Processes III

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The corrosion behaviour of mild steel and 316L austenitic stainless steel was investigated in saline solution containing 1 and 3%NaCl. Specimens with surface roughness of 200, 600 grit emery paper and 1μm diamond paste were investigated. The anodic polarization measurement technique was performed at a scan rate of 1mV/s for a fixed period of 1 hour. The experimental results revealed that chloride ions have a significant effect on the corrosion behaviour of both steels as expected. As the surface roughness of 316L stainless steel increased, the breakdown potential (E break ), the free corrosion potential (E corr ) and the width of passivity decreased, hence the corrosion rate increased. However, in the case of mild steel specimens, improving surface finish lead to shifts in the corrosion potential to more noble states and increased the corrosion rate. Metallographic examination of corroded specimens after electrochemical corrosion tests confirmed that the breakdown of the passive region was due to pitting corrosion.

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“…[5][6][7][8][9][10][11][12][13][14][15][16][17] Rust layers often form on the surface of steel structures experiencing a corrosion process, and the associated corrosion performance is dependent on a number of factors including rust formation, rust evolution and the inherent properties of the rust layers such as composition and structures. If pitting corrosion of HSLA steel occurs after prolonged exposure in the marine splash zone, as observed in R. Jeffery et al's exposure tests, 4 it can be speculated that the rust layer may contribute to the origins of pitting corrosion. Accordingly, research on the exact chemical nature of the corrosion products formed through the corrosion of iron and its alloys under field conditions in the marine splash zone, referred to as "rust", will assist with understanding the effect of rust layers on the pitting corrosion of HSLA.…”

Section: Introductionmentioning

confidence: 99%

“…Pitting corrosion is one form of localized corrosion, with previous research showing that pitting occurs after prolonged exposure to the marine environment. 4 Consequently, it is important to evaluate the corrosion behavior of HSLA in the marine splash zone and to elucidate the mechanism of pitting corrosion under these environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Performance of High Strength Low Alloy Steel AISI 4135 in the Marine Splash Zone

2017

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The corrosion behavior of high strength low alloy AISI 4135 steel was studied following extended exposure to a Qingdao field environment. When electrochemically active γ-FeOOH was formed in conjunction with easily reducible β-FeOOH, these corrosion products acted to accelerate corrosion attack in the marine splash zone (i.e., steel structure above the water line that is splashed by sea spray). It had also been observed that the pH beneath the rust layer exhibited a minimum during the non-splash part of wet and non-splash corrosion cycling. These acidic conditions contributed significantly to an increase in the rate of localized corrosion, both beneath the rust deposits and within rust cracks and voids within pockets of rust deposits over the steel surface.

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The changing topography of corroding mild steel surfaces in seawater

Cited by 99 publications

References 16 publications

Corrosion of mild steel and 316L austenitic stainless steel with different surface roughness in sodium chloride saline solutions

Corrosion of mild steel and 316L austenitic stainless steel with different surface roughness in sodium chloride saline solutions

Corrosion of mild steel and 316L austenitic stainless steel with different surface roughness in sodium chloride saline solutions

Corrosion Performance of High Strength Low Alloy Steel AISI 4135 in the Marine Splash Zone

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