Proposal for Weathering Alloy Index and Accelerated Corrosion Test Method to Select Weathering Steels

Miki, Chitoshi; Ichikawa, Atsushi; Ukai, Makoto; Takemura, Masashi; Nakayama, Tsuneyoshi; Kihira, Hiroshi

doi:10.2208/jscej.2003.738_271

Cited by 11 publications

(5 citation statements)

References 6 publications

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“…These steels contain mainly nickel, and other alloy components vary according to the type of steel [4], as shown in Table 2. An example of a railway bridge on which Niadvanced weathering steel was applied is shown in Fig.…”

mentioning

confidence: 99%

“…In addition, the existing method cannot evalu- To evaluate the applicability of weathering steels including the Ni-advanced type, Miki et al proposed a new method using exposure test and prediction of long-term corrosion loss [4].…”

mentioning

confidence: 99%

“…Parameter B represents the degree of corrosion speed decrease due to the protective rust layer formed on the surface of the steel. These parameters can be calculated according to the components of each steel type [4].…”

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confidence: 99%

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Evaluation of Applicability for Ni-advanced Weathering Steels and Bridge High-performance Steels to Railway Steel Bridges

Sugimoto¹,

Kita²

2010

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Evaluation of Applicability for Ni-advanced Weathering Steels and Bridge High-performance Steels to Railway Steel Bridges

Sugimoto¹,

Kita²

2010

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“…An inverted white triangle in Figure 1 indicates the water-supplying phase, in which tap water, 0.1 wt%, and 3 wt% NaCl solution is supplied to each specimen for the first 8 days. The amount of supplied water is set as 40 µL/mm 2 [13]. From 9-24 days, only the exposure phase is repeated.…”

Section: Materials and Measuring Methodsmentioning

confidence: 99%

Measurement of Water Retention Ratio in Rust Layer by Electrical Resistance

Hasuike,

Yoneyama,

Aso

2023

Buildings

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One significant form of deterioration in weathering steel bridges is corrosion, and steel requires water and oxygen to corrode. As a measurement method for the wetness time of the rust layer on weathering steel, measuring electrical resistance has been proposed. In this research, the fundamental data have been collected as preliminary considerations to develop this method of measuring water retention in the rust layer. Based on the measurement of specimens, it is revealed that measuring the exact amount of water retention is difficult because electrical resistance depends on the thickness of the rust layer and the supplied amount of NaCl. Thus, the water retention ratio is calculated by dividing the mass of the water-retained specimen by the mass of the full water-retained specimen. These measurement results suggest a potential method for predicting water retention ratio by measuring electrical resistance and rust thickness. The approximate water retention ratio is predicted by plotting electrical resistance and rust thickness in the proposed diagram.

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“…To modify corrosion loss to occur for nickel containing advanced weathering steels [2][3][4][5][6][7][8][9][10][11], one may use so called weathering alloy index V [8] which can be calculated by,…”

Section: Methodsmentioning

confidence: 99%

Additions to Contingency Plan for Enhancing Secureness of Weathering Steel Structures

et al. 2009

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The purpose of this research is to enhance secureness of weathering steel bridges by preparing contingency plan. So far risk based designing and maintenance system including a computerized corrosion prediction method , visual as well as instrumental rust monitoring methods, etc. has been developed. As the third stage of this project, additional contingency tools and agents were developed for repair painting of anomalously rusted parts. Unlike organic or inorganic materials, weathering steels do not deteriorate internally. Thus life time of weathering steel bridges can be prolonged to a large extent without difficulties, since handling of risk based maintenance system for weathering steel structures has become much easier than ever.

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Proposal for Weathering Alloy Index and Accelerated Corrosion Test Method to Select Weathering Steels

Cited by 11 publications

References 6 publications

Evaluation of Applicability for Ni-advanced Weathering Steels and Bridge High-performance Steels to Railway Steel Bridges

Evaluation of Applicability for Ni-advanced Weathering Steels and Bridge High-performance Steels to Railway Steel Bridges

Measurement of Water Retention Ratio in Rust Layer by Electrical Resistance

Additions to Contingency Plan for Enhancing Secureness of Weathering Steel Structures

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