Characterization of the Corrosion Products Formed on Carbon Steel in Qinghai Salt Lake Atmosphere

Li, Q. X.; Wang, Z. Y.; Han, Wei; Han, En‐Hou

doi:10.5006/1.3278414

Cited by 17 publications

(6 citation statements)

References 2 publications

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“…38,39 It is believed that akaganeite comes from the oxidation of green rust GR1(Cl), [40][41][42] which is one of the initial rust phases in NaCl-induced marine atmospheric corrosion. 9,10 Sea salts that deposit on steel samples first initiate corrosion and then can be incorporated into the corrosion products.…”

Section: Discussionmentioning

confidence: 99%

A Micro-Raman Spectroscopic Study of Marine Atmospheric Corrosion of Carbon Steel: The Effect of Akaganeite

Hihara

2015

J. Electrochem. Soc.

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Micro-Raman spectroscopy was used to characterize the rust formed on 1008 carbon steel exposed to marine test sites in Hawaii. Besides lepidocrocite in the outer rust layers and goethite in the inner rust layers, akaganeite was detected on all samples due to the presence of Cl − and increased in quantity in the rust layer with increasing Cl − deposition rate. The presence of Cl − did not affect the corrosion rate of carbon steel when the Cl − deposition rate was lower than a threshold of approximately 75 mg/m 2 /day, but significantly increased the corrosion rate when the Cl − deposition rate was higher than the threshold. This is likely due to akaganeite being a sink for Cl − by incorporating it into its tunnel structure when salt deposition is below a certain level. Once the akaganeite is saturated with Cl − and the akaganeite cannot take up any more Cl − , free Cl − can be available to accelerate corrosion at anodic sites.

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Section: Discussionmentioning

confidence: 99%

A Micro-Raman Spectroscopic Study of Marine Atmospheric Corrosion of Carbon Steel: The Effect of Akaganeite

Hihara

2015

J. Electrochem. Soc.

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“…Wang et al, studied the atmospheric corrosion of carbon steel during 12 months near Qinghai salt lake in China. Based on the results obtained from IR transmission spectroscopy it was concluded that β-FeOOH (450, 690, and 840 (weak)·cm −1 ), γ-FeOOH (1020 cm −1 ), and δ-FeOOH (790, 880, and 1110 cm −1 ) were formed, where the latter peak could be used to qualitatively assess the crystallinity since less crystalline samples exhibited a broader band [ 7 , 8 ]. In addition, water in the samples was revealed by a peak at 1630 cm −1 (bending vibration).…”

Section: Resultsmentioning

confidence: 99%

Vibrational Spectroscopy in Studies of Atmospheric Corrosion

Hosseinpour

Johnson

2017

Materials

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Vibrational spectroscopy has been successfully used for decades in studies of the atmospheric corrosion processes, mainly to identify the nature of corrosion products but also to quantify their amounts. In this review article, a summary of the main achievements is presented with focus on how the techniques infrared spectroscopy, Raman spectroscopy, and vibrational sum frequency spectroscopy can be used in the field. Several different studies have been discussed where these instruments have been used to assess both the nature of corrosion products as well as the properties of corrosion inhibitors. Some of these techniques offer the valuable possibility to perform in-situ measurements in real time on ongoing corrosion processes, which allows the kinetics of formation of corrosion products to be studied, and also minimizes the risk of changing the surface properties which may occur during ex-situ experiments. Since corrosion processes often occur heterogeneously over a surface, it is of great importance to obtain a deeper knowledge about atmospheric corrosion phenomena on the nano scale, and this review also discusses novel vibrational microscopy techniques allowing spectra to be acquired with a spatial resolution of 20 nm.

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“…The industrial development of the eastern region has resulted in serious atmospheric contamination, while the tableland in the western part is exposed to strong ultraviolet radiation and frequent sandstorms. Close to Qianghai Lake, the sand contains a lot of salt [45]. Because of the big differences in the climate and concentrations of corrosive substances in the atmosphere across the country, the corrosion rate of materials is strongly dependent on the site where the materials are located.…”

Section: Climate Characteristics and The National Corrosionmentioning

confidence: 99%