Open AccessMorphological Changes Occurred During Long Time Atmospheric Corrosion Process of Mild Steel and their Effect on Mechanical Properties
Author(s) -
Pavitra Muralidhar,
G. Satyanarayana,
G. Nageswara Rao
Publication year - 2019
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2019.22164
Subject(s) - corrosion , metallurgy , delamination (geology) , pitting corrosion , materials science , composite material , geology , paleontology , subduction , tectonics
The present work, involves the analysis of a long time corroded steel channel (MC 150 having dimensions 150 cm × 75 cm × 5.7 cm, a nominal weight of 16.8 kg/m, which was rolled from a fully killed continuous cast steel blooms) meant for constructing huge steel structures was performed. The analysis of this typical corrosion was done in a different direction to know the morphological changes occurred during the long time atmospheric corrosion periods of wet dry conditions. The extent of deterioration of mechanical properties in these structural components may reduce the life span of particular component. The focus of this present study is to analyze the reasons for the splitting of corrosion product layers during the long time atmospheric corrosion conditions, which resulted in the drastic deterioration of mechanical properties. The XRD analysis of delaminated layers was also performed. The physico-chemical changes occurred in the process of long time atmospheric corrosion were also investigate. It is found that pitting is the major contributor for the formation, growth, delamination of corrosion product layers during the long time atmospheric corrosion process, whichresulted in the drastic reduction of mechanical properties.