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Title: Composite film formation on iron in sulfuric acid by bismuth(III) chloride and benzyl thiocyanate

Abstract

A synergistic inhibitory effect of bismuth(3) chloride and benzyl thiocyanate (C[sub 6]H[sub 5]CH[sub 2]SCN) on corrosion of iron (Fe) in 1 N sulfuric acid was investigated using polarization and impedance measurements. A composite protective film formed on the Fe surface by a combination of both compounds. The film was analyzed by x-ray photo-electron spectroscopy and electron probe microanalysis. Inhibition efficiency of > 99% was obtained by the formation of the protective film. The film comprised an inner layer of metallic bismuth (Bi) and an outer layer of metallic oxide containing a deposited oxidative-addition product of C[sub 6]h[sub 5]CH[sub 2]SCN. A small spot uncoated with the Bi layer was covered mostly with the product layer, suppressing the anodic process of Fe corrosion. The cathodic process was inhibited by the high hydrogen (H) overpotential of the metallic Bi deposited on most of the substrate surface.

Authors:
; ;  [1]
  1. (Keio Univ., Yokohama (Japan). Dept. of Chemistry)
Publication Date:
OSTI Identifier:
5118324
Resource Type:
Journal Article
Journal Name:
Corrosion (Houston); (United States)
Additional Journal Information:
Journal Volume: 50:3; Journal ID: ISSN 0010-9312
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BISMUTH CHLORIDES; PERFORMANCE; CORROSION INHIBITORS; IRON; CORROSION; THIOCYANATES; PROTECTIVE COATINGS; ANTITHYROID DRUGS; BISMUTH COMPOUNDS; CARBONIC ACID DERIVATIVES; CHEMICAL REACTIONS; CHLORIDES; CHLORINE COMPOUNDS; COATINGS; DRUGS; ELEMENTS; HALIDES; HALOGEN COMPOUNDS; HORMONE ANTAGONISTS; METALS; ORGANIC COMPOUNDS; ORGANIC SULFUR COMPOUNDS; TRANSITION ELEMENTS; 360105* - Metals & Alloys- Corrosion & Erosion

Citation Formats

Ohi, M., Nishihara, H., and Aramaki, K. Composite film formation on iron in sulfuric acid by bismuth(III) chloride and benzyl thiocyanate. United States: N. p., 1994. Web. doi:10.5006/1.3293514.
Ohi, M., Nishihara, H., & Aramaki, K. Composite film formation on iron in sulfuric acid by bismuth(III) chloride and benzyl thiocyanate. United States. doi:10.5006/1.3293514.
Ohi, M., Nishihara, H., and Aramaki, K. Tue . "Composite film formation on iron in sulfuric acid by bismuth(III) chloride and benzyl thiocyanate". United States. doi:10.5006/1.3293514.
@article{osti_5118324,
title = {Composite film formation on iron in sulfuric acid by bismuth(III) chloride and benzyl thiocyanate},
author = {Ohi, M. and Nishihara, H. and Aramaki, K.},
abstractNote = {A synergistic inhibitory effect of bismuth(3) chloride and benzyl thiocyanate (C[sub 6]H[sub 5]CH[sub 2]SCN) on corrosion of iron (Fe) in 1 N sulfuric acid was investigated using polarization and impedance measurements. A composite protective film formed on the Fe surface by a combination of both compounds. The film was analyzed by x-ray photo-electron spectroscopy and electron probe microanalysis. Inhibition efficiency of > 99% was obtained by the formation of the protective film. The film comprised an inner layer of metallic bismuth (Bi) and an outer layer of metallic oxide containing a deposited oxidative-addition product of C[sub 6]h[sub 5]CH[sub 2]SCN. A small spot uncoated with the Bi layer was covered mostly with the product layer, suppressing the anodic process of Fe corrosion. The cathodic process was inhibited by the high hydrogen (H) overpotential of the metallic Bi deposited on most of the substrate surface.},
doi = {10.5006/1.3293514},
journal = {Corrosion (Houston); (United States)},
issn = {0010-9312},
number = ,
volume = 50:3,
place = {United States},
year = {1994},
month = {3}
}