Effect of carbon on corrosion resistance of powder-processed Fe�??0.35%P alloys

Bulletin of materials science

P S Mishra¹  Shefali Trivedi³  Yashwant Mehta²  K Chandra¹ 

[1] Metallurgical and Materials Engineering Department, Indian Institute of Technology, Roorkee 247 667, India$$Metallurgical and Materials Engineering Department, Indian Institute of Technology, Roorkee 247 667, IndiaMetallurgical and Materials Engineering Department, Indian Institute of Technology, Roorkee 247 667, India$$;Metallurgical and Materials Engineering Department, National Institute of Technology Srinagar, Srinagar 190 006, India$$Metallurgical and Materials Engineering Department, National Institute of Technology Srinagar, Srinagar 190 006, IndiaMetallurgical and Materials Engineering Department, National Institute of Technology Srinagar, Srinagar 190 006, India$$;Department of Mechanical Engineering, Indian Institute of Technology, New Delhi 110 016, India$$Department of Mechanical Engineering, Indian Institute of Technology, New Delhi 110 016, IndiaDepartment of Mechanical Engineering, Indian Institute of Technology, New Delhi 110 016, India$$

关键词: Phosphoric iron;    corrosion;    powder metallurgy;    forged;    ancient iron.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

The corrosion behaviour of phosphoric irons containing 0.35 wt % P, 2% copper, 2% nickel, 1% silicon, 0.5% molybdenum, with/without 0.15% carbon prepared by powder forging route were studied in different environments. The various environments chosen were acidic (0.25 M H₂SO₄ solution of pH 0.6), neutral/marine (3.5% NaCl solution of pH 6.8) and alkaline (0.5 M Na₂CO₃ + 1.0 M NaHCO₃ solution of pH 9.4). The corrosion studies were conducted using Tafel extrapolation and linear polarization methods. The studies also compare Armco iron with phosphoric irons. It was observed that the addition of carbon improved the corrosion resistance of a Feâ€�??0.35%Pâ€�??2%Niâ€�??2%Cuâ€�??1%Siâ€�??0.5%Mo alloy in all the environments. Corrosion rates were highest in acid medium, minimal in alkaline medium and low in neutral solution. SEM/EDAX was used to characterize the compositions.

【 授权许可】

Unknown