Development of high strength low alloy steels for marine applications: Part 1: Results of long term exposure tests on commercially available and experimental steels

Blekkenhorst, F.; Ferrari, G.; Wekken, C. J. van der; Ijsseling, F. P.

doi:10.1179/000705986798272136

Cited by 62 publications

(24 citation statements)

References 5 publications

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“…trend for the six deepest pits (i.e., including the deepest pits) can be interpreted as consisting of stepped increments in pit depth of about 0.35 mm ( Figure 6). A similar comparison between the trends for maximum pit depth can be seen for a variety of steels immersion exposed in the North Sea for 7.2 years [33]. Just three examples of the matching datasets for maximum pit depth are shown in Figure 7 together with added trends.…”

Section: Trends In Pit Depth and Corrosion Losssupporting

confidence: 63%

A Review of Trends for Corrosion Loss and Pit Depth in Longer-Term Exposures

Melchers

2018

CMD

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For infrastructure applications in marine environments, the eventual initiation of corrosion (and pitting) of steels (and other metals and alloys) often is assumed an inescapable fact, and practical interest then centres on the rate at which corrosion damage is likely to occur in the future. This demands models with a reasonable degree of accuracy, preferably anchored in corrosion theory and calibrated to actual observations under realistic exposure conditions. Recent developments in the understanding of the development of corrosion loss and of maximum pit depth in particular are reviewed in light of modern techniques that permit much closer examination of pitted and corroded surfaces. From these observations, and from sometimes forgotten or ignored observations in the literature, it is proposed that pitting (and crevice corrosion) plays an important role in the overall corrosion process, but that longer term pitting behaviour is considerably more complex than usually considered. In turn, this explains much of the, often high, variability in maximum depths of pits observed at any point in time. The practical implications are outlined.

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Section: Trends In Pit Depth and Corrosion Losssupporting

confidence: 63%

A Review of Trends for Corrosion Loss and Pit Depth in Longer-Term Exposures

Melchers

2018

CMD

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“…However, when mild steel is exposed to saline solutions and marine environment, this type of corrosion is not observed. Anodic regions and micro-pits develop very quickly after early exposure and further presence of shallow broad pits occurs [2,3]. When a high corrosion resistance is required, stainless steel is recommended.…”

Section: Introductionmentioning

confidence: 99%

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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“…[6][7][8] However, it costs a lot to operate and maintain the protective system. 9) For these reasons, it was required to develop steels which have excellent corrosion resistance and maintain good mechanical properties such as weldability and mechanical strength compared to commercial steels.…”

Section: Introductionmentioning

confidence: 99%

“…The alloying elements are added in order to enhance corrosion resistance and improve lifetime of the steels. 5,9,12,13) There have been many developments of low alloy steel applied to marine structures based on alloy design. Recently, the steel plates used for container ships and upper deck of ballast tank were reported.…”

Section: Introductionmentioning

confidence: 99%

Effect of Molybdenum on the Corrosion of Low Alloy Steels in Synthetic Seawater

et al. 2016

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The alloying effect of Mo on the seawater immersion corrosion for low alloy steel was investigated using weight loss tests and electrochemical impedance spectroscopy (EIS) in seawater. The Mo-containing low alloy steel showed an excellent corrosion resistance by the long immersion test due to the formation of homogeneous rust layer preventing active dissolution. SEM and XPS analyses were conducted to observe cross-sectional images of rust layer and indentify chemical composition of oxide formed on the surface after immersion test. The results revealed that the MoO 4 2− ions which were oxidized from Mo form the compounds which disturb the approach of aggressive ions.

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Development of high strength low alloy steels for marine applications: Part 1: Results of long term exposure tests on commercially available and experimental steels

Cited by 62 publications

References 5 publications

A Review of Trends for Corrosion Loss and Pit Depth in Longer-Term Exposures

A Review of Trends for Corrosion Loss and Pit Depth in Longer-Term Exposures

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

Effect of Molybdenum on the Corrosion of Low Alloy Steels in Synthetic Seawater

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