Effect of Diacetyl Monoxime Thiosemicarbazone on the Corrosion of Aged 18 Ni 250 Grade Maraging Steel in Sulphuric Acid Solution | Zendy

T. Poornima | Zendy; Jagannath Nayak | Zendy; A. Nityananda Shetty | Zendy

Open Access

Effect of Diacetyl Monoxime Thiosemicarbazone on the Corrosion of Aged 18 Ni 250 Grade Maraging Steel in Sulphuric Acid Solution

Author(s) -

T. Poornima,

Jagannath Nayak,

A. Nityananda Shetty

Publication year - 2012

Publication title -

journal of metallurgy

Language(s) - English

Resource type - Journals

eISSN - 1687-9473

pISSN - 1687-9465

DOI - 10.1155/2012/723687

Subject(s) - maraging steel , adsorption , diacetyl , semicarbazone , corrosion , chemistry , langmuir adsorption model , polarization (electrochemistry) , inorganic chemistry , metallurgy , nuclear chemistry , materials science , biochemistry , stereochemistry , organic chemistry

The corrosion inhibition of the aged 18 Ni 250 grade maraging steel in 0.5 M sulphuric acid by diacetyl monoxime thiosemicarbazone (DAMTSC) at 303–323 K has been investigated by potentiodynamic polarization, EIS, and SEM techniques. Good inhibition efficiency of DAMTSC was revealed even at low concentrations, which increased with the increase in DAMTSC concentration and decreased with the increase in temperature. The activation energies, , as well as other thermodynamic parameters (; ; ), were evaluated and discussed. The adsorption of DAMTSC on the aged maraging steel surface was found to obey the Langmuir adsorption isotherm model and shows mixed type inhibition behavior

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