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- Title
Inhibition effect of adsorption layer of 1-phenyl-4-(4-nitrophenyl) thiosemicarbazide on the corrosion of 18 Ni 250-grade welded maraging steel in 1.0 M hydrochloric acid medium.
- Authors
Kumar, Pradeep; Nityananda Shetty, A.
- Abstract
The thiosemicarbazide derivative, 1-phenyl-4-(4-nitrophenyl)thiosemicarbazide (PNPT), was synthesized and its inhibiting action on the corrosion of welded maraging steel in 1.0 M hydrochloric acid was investigated by electrochemical methods of potentiodynamic (Tafel) polarization and electrochemical impedance spectroscopy. The inhibitor, PNPT, acted essentially as a mixed-type inhibitor with predominant cathodic action. The inhibition efficiency increased with the increase in inhibitor concentration. An inhibition efficiency of about 86 % was exhibited at 30 °C, which decreased with the increase in the temperature. The adsorption of the inhibitor layer formed was through predominant physical adsorption process.
- Subjects
HYDROCHLORIC acid; CHLORINE compounds; INORGANIC acids; NONCARBOXYLIC acids; SPECTRUM analysis
- Publication
Research on Chemical Intermediates, 2015, Vol 41, Issue 10, p7095
- ISSN
0922-6168
- Publication type
Article
- DOI
10.1007/s11164-014-1800-9