Influence of carbon content and microstructure on corrosion behaviour of low alloy steels in a Cl− containing environment

Guo, Jia; Yang, Sen; Chen, Shang; Wang, Ying; He, Xiao

doi:10.1016/j.corsci.2008.10.025

Cited by 172 publications

(52 citation statements)

References 14 publications

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“…The reason for the different microstructures corresponding to different corrosion behaviors can be attributed to different carbon-rich phases in steels [17]. There are a lot of M/A islands in LAS-W, while there are pearlite in the LAS-F and 09CuPCrNi.…”

Section: Discussionmentioning

confidence: 99%

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Incubation and development of corrosion in microstructures of low alloy steels under a thin liquid film of NaCl aqueous solution

Wen-hua

Yang

Guo

et al. 2010

Int J Miner Metall Mater

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Electrochemical measurement, optical microscopy, and scanning electron microscopy were employed to investigate the corrosion behavior of some low alloy steels. The steels were held under a thin liquid film of 0.5wt% NaCl aqueous solution. It is found that the steels with the same chemical composition but different microstructures exhibit obviously different corrosion behaviors. However, the corrosion behavior of the steels with different compositions but the same microstructures may be similar in the present investigation. The corrosion rate of bainite is slower than that of ferrite and pearlite. The corrosion products of bainite are uniform and fine. The size of carbon-rich phases produces a great impact on the corrosion of the steels, whether in the initial stage or in the long term. It is easy to induce large pitting for carbon-rich phases with large size, which damages the compactness of the rust layer.

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Section: Discussionmentioning

confidence: 99%

“…The results showed that the corrosion resistance of bainitic steel is better than that of 09CuPCrNi. Guo [17][18] found that the rust layers on ferrite and bainite are compact, while the rust layer on pearlite is loose.…”

Section: Introductionmentioning

confidence: 99%

Incubation and development of corrosion in microstructures of low alloy steels under a thin liquid film of NaCl aqueous solution

Wen-hua

Yang

Guo

et al. 2010

Int J Miner Metall Mater

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“…With prolonged corrosion time, the thickness ratio of inner rust layer to whole rust layer continues to decrease so that SSA of rust layer reduces in the 4 th month. 8) As for group B, the Rr and the SSA increased continuously in the whole corrosion process, and the corrosion degree of group B is lower than that of group A (Fig. 1).…”

Section: Discussionmentioning

confidence: 99%

“…The widely used accelerated corrosion tests are carried out in the environments of constant corrosion solution, temperature and humidity by wet-dry cycle with short period. 8,9) Thus, these accelerated corrosion tests cannot reflect the corrosion behavior of weathering steel in environment changing with long period.…”

Section: Introductionmentioning

confidence: 99%

Atmospheric Corrosion Behavior of Weathering Steel in Periodically Changed Environment

et al. 2014

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The service environments of weathering steel are periodically various. However, the general accelerated corrosion test cannot effectively simulate the periodic change. In order to investigate the influence of periodic changed environments on corrosion, a low alloy weathering steel was exposed to an indoor air with NaCl and NaHSO3 aqueous solutions spraying the steel in turns. It was found that both atmospheric corrosion rate and the degree of alloy element enrichment in the inner rust layer were higher when the samples were sprayed with NaCl aqueous solution. Meanwhile, more compact rust layers were formed when the samples were sprayed with NaHSO3 aqueous solution. Rust layer would stabilize more rapidly by spraying NaCl and NaHSO3 aqueous solutions in turns than by spraying a single corrosion solution, which can be attributed to a combined advantage of alloy element enrichment and slow corrosion. Stabilization of rust layer is not necessarily derived from enrichment of alloy elements and stabilization of rust layer can produce stronger effect against further corrosion than enrichment of alloy elements.

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“…El difractograma obtenido fue evaluado con el software X'Pert HighScore Plus [9]. El análisis cuantitativo se llevó a cabo mediante el mismo software utilizando el método de Rietveld, utilizando Óxido de Aluminio como standard interno al 30% [10].…”

Section: Materiales Y Metodosunclassified

Influencia de Ni y Ti en la respuesta a la corrosión marina simulada de un acero autopatinable A242

et al. 2015

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RESUMENExiste un gran interés en la industria siderúrgica por incorporar nuevos productos que superen las propiedades de los ya existentes. Dentro de estas propiedades, la resistencia a la corrosión es de gran importancia para los países que, al igual que Chile, tienen abundante litoral marino. En las zonas costeras los iones cloruro presentes en el aire producen deterioro por corrosión lo que disminuye la vida útil de las estructuras. Por esta razón es que es de vital importancia investigar la influencia de los distintos elementos aleantes y tratamientos que lleven a mejorar la resistencia de los aceros frente a la corrosión marina. Este trabajo apunta al estudio de aceros autopatinables ASTM A242 de baja aleación, específicamente con adición de Níquel a la aleación, y a la adición de Titanio como afinador de la microestructura, y su influencia sobre la resistencia a la corrosión atmosférica utilizando ensayos de corrosión acelerada producida en cámara de niebla salina con ciclos de humectación y secado. En las aleaciones estudiadas se determinó el espesor corroído de las muestras y la velocidad de corrosión. Los diferentes productos de corrosión, óxidos y oxihidróxidos de hierro se identificaron por rayos X. Los resultados muestran claramente que luego de 40 ciclos (960 horas) de tratamiento, en comparación con un acero ASTM A242, la velocidad de corrosión disminuye en forma significativa en el mismo acero con aleación de Níquel, y más aún con adición de Titanio como afinador de grano. Este resultado se ve también reflejado en una disminución del espesor corroído de los cupones, observándose el menor espesor corroído en el acero ASTM A242 con Ni y Ti.Palabras clave: corrosión acelerada, acero autopatinable, atmosfera marina. ABSTRACTThere is a great interest in the steel industry to incorporate new products in the market with better properties of those already in production. Among these properties, corrosion resistance is of great importance for countries with a large marine seacoast, like Chile, where chloride ions from sea spray produce corrosion, leading to irreversible failure of steel structures decreasing their life. For this reason, it is of vital importance to investigate the influence of various alloying elements and treatments for steels with superior corrosion resistance properties in marine environment. This work aims at studying the specific influence of Nickel -as an alloy constituent -and Titanium -as a microstructural tuner -on ASTM A242 low alloy weathering steel. For that, atmospheric corrosion resistance was evaluated through accelerated salt spray corrosion experiments under wet/dry cycles. For each alloy the thickness of corrosion products and corrosion rates

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Influence of carbon content and microstructure on corrosion behaviour of low alloy steels in a Cl− containing environment

Cited by 172 publications

References 14 publications

Incubation and development of corrosion in microstructures of low alloy steels under a thin liquid film of NaCl aqueous solution

Incubation and development of corrosion in microstructures of low alloy steels under a thin liquid film of NaCl aqueous solution

Atmospheric Corrosion Behavior of Weathering Steel in Periodically Changed Environment

Influencia de Ni y Ti en la respuesta a la corrosión marina simulada de un acero autopatinable A242

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