Corrosion Polarization and K2Cr2O7 Inhibition Behaviour of Martensitic Stainless Steel in H3PO4 and H3PO4 + 3.65% NaCl Environments
No Thumbnail Available
Date
Journal Title
Journal ISSN
Volume Title
Publisher
Springer Science+Business Media Dordrecht
Abstract
Description
The corrosion resistance behaviour of 12Cr martensitic
stainless steel was evaluated in different concentrations
of H3PO4 and H3PO4 + NaCl. Corrosion inhibition of
the tested samples in 1M H3PO4 was also evaluated using
potassium dichromate. The experiments were performed at
ambient temperature of 27◦ using potentiodynamic polarization
measurements. Different concentrations of the test
media were used with sodium chloride addition. Tafel and
polarization resistance techniques were used to estimate the
corrosion rate, the polarisation resistance and inhibition of
the alloy samples tested. The results showed some magnitude
of corrosion susceptibility for the stainless steel at
higher H3PO4 concentrations and also in the acid chloride
test media. Effective corrosion inhibition was also exhibited
on the tested samples.
Keywords
T Technology (General), TJ Mechanical engineering and machinery