Rengaswamy, N.S. and Rajagopalan, K.S. and Vasu, K.I. and Ranganatham, B.V. (1985) Stress corrosion cracking of prestressing steel in sulphide medium. Bulletin of Electrochemistry , 01 (05). pp. 453-460. ISSN 0256-1654

PDF - Published Version
Download (810Kb) | Preview


Stress corrosion cracking behaviour of colddrawn and stress-relieved prestressing steel of standard quality conforming to IS. 1785- Part I has been studied in H2S saturated aqueous solution with and w~thout chloride. The steel was found to be highly susceptible to cracking even under open circuit condition at room temperature.The suscept~b~litdye creased slightly with temperature in the range 3O0C- 80°C. The threshold stress was found to increase with pH of the medium from 15%of proof stress at pH 2.6 to 40 %of proof stress at pH 6.5. A limiting pH of 7 above which stress corrosion cracking did not occur was obtained for water- H2S system and the corresponding value in 3.5PbNaCI- H2S system was found to be 9. Cathodic polar~sationd ecreased the time to failure while anodic polarisation increased the time to failure. Application of tensile stress was,found to increase the corrosion rate and also the solubility of hydrogen. The strain rate was found to have profound influence on the cracking process and the susceptihlity was h~gha t very low stram rates. SEM fractographic studies revealed that the fracture mode was predominantly intergranular. All these observations could be understood in terms of a decohesion model

Item Type: Article
Uncontrolled Keywords: Stress Corrosion Cracking; Prestressing steel; Hydrogen permeation
Subjects: Corrosion Science and Engineering
Depositing User: ttbdu cecri
Date Deposited: 21 Mar 2012 02:25
Last Modified: 21 Mar 2012 02:25

Actions (login required)

View Item View Item