Electrochemical characteristics of BIS 2062 carbon steel under simulated ocean acidification scenario

Climate change is always attributed to the rise in temperature and emission of gases like CO2, and the latter is largely responsible for ocean acidification.The impact of ocean acidification is widely studied on marine organismsbut not on the fate ofmarine materials exposed in the ocean. The present studyaimed to assess the electrochemical characteristics ofBIS 2062boat building carbon steeldue to the acidification of seawater. Electrochemical characteristics of steel were studied using acidified natural seawater (pH 8.05 to 6.50) asanelectrolyte. Severe degradation of steelhasoccurred when the pH of seawater decreasedfrom 8.05 to 7.90therebyshifted the corrosion rate by 0.61 to 1.56 mm yr-1. This was further aggravated withthe severity ofacidification. Results of the electrochemical impedance spectroscopy corroborated the findings of linear polarisation and also provedthe formation of varied forms of FeOOH layers. The results stronglysuggest the need for detailed study and redesign of marine materials in tune with ocean acidification.

Devika K. R. & Ashraf P. M., 2020. Electrochemical characteristics of BIS 2062 carbon steel under simulated ocean acidification scenario. ChemRxiv. Article.

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Ocean acidification in the IPCC AR5 WG II

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