Cast iron deterioration with time in various aqueous salt solutions

Bulletin of materials science

Rita Mehra¹  Aditi Soni¹ 

[1] Department of Applied Chemistry, Maharshi Dayanand Saraswati University, Ajmer 305 009, India$$Department of Applied Chemistry, Maharshi Dayanand Saraswati University, Ajmer 305 009, IndiaDepartment of Applied Chemistry, Maharshi Dayanand Saraswati University, Ajmer 305 009, India$$

关键词: Corrosion;    cast iron;    water;    salts.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

The changes with time in the corrosion rate and corrosion current density on a cast iron electrode in various aqueous salt solutions have been carried out using total immersion test and potentiostatic polarization curves. The concentration of salts taken is expected to be present in potable water. The relative behaviour of these salts towards corrosion has also been studied, which is found to be different from previous studies. The total immersion test parameters viz. weight loss, corrosion rate as well as potentiostatic parameters, open circuit potential, 𝐼_corr, Tafel slopes, corrosion rate, have been calculated by standard methods. Besides these the relative increase in corrosion rate with time as well as the percentage to which corrosion rate should be decreased so as to provide protection towards corrosion have also been calculated. It was found that KCl and NaCl are major contributors than MnSO₄, Pb(NO₃)₂, KI and KBr. The relative increase in corrosion is high in KBr, KI, NaNO₃, CaCl₂, and less in Pb(NO₃)₂, NaHCO₃ and CaCO₃ test solutions. For the reliability of results the data has been statistically analysed.

【 授权许可】

Unknown