Open AccessElectrochemical study of the corrosion inhibition effect of 3-cyanophenyl compound on 420 martensitic stainless steel in strong acid media
Author(s) -
Roland Tolulope Loto,
Bryan Uche Ayozie,
C. A. Loto
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/613/1/012012
Subject(s) - adsorption , chemisorption , corrosion , materials science , freundlich equation , electrochemistry , polarization (electrochemistry) , langmuir adsorption model , dielectric spectroscopy , fourier transform infrared spectroscopy , martensite , langmuir , nuclear chemistry , metallurgy , chemical engineering , chemistry , organic chemistry , electrode , microstructure , engineering
The corrosion inhibition performance of 3-cyanophenyl organic compound on heat treated 420 martensitic stainless steel in 6 M H 2 SO 4 was evaluated through potentiodynamic polarization test, ATR-FTIR spectroscopy and adsorption isotherm studies. Results obtained proves the compound to be effective with highest inhibition performance value of 99.4%. The inhibition property was determined to be mixed type inhibition with significant anodic inhibition tendencies. Adsorption of the compound onto the steel was through chemisorption mechanism in agreement with the Langmuir and Freundlich isotherms models at correlation coefficients of 1 and 0.7570. The transmittance of detected functional groups of 3-cyanophenyl diminished at distensible wavelengths because of excellent surface coverage and adsorption of the compound onto the steel