Thiophenol as an inhibitor for the corrosion and hydrogen permeation through mild steel in acidic solutions

Anti-Corrosion Methods and Materials

Almathami

Saricimen

et al. 2002

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Section: Electronic Accessmentioning

confidence: 99%

“…However, thiophenols have not been given much attention as inhibitors because of their obnoxious odour and low solubility in acidic solutions (Madhavan et al, 1998).…”

Section: Electronic Accessmentioning

confidence: 99%

A study of corrosion control of carbon steel using inhibitors in a simulated environment

Anti-Corrosion Methods and Materials

Almathami

Saricimen

et al. 2002

“…A literature review resulted in a large number of chemicals for the inhibition of steel corrosion, including benzoates, nitrites, sebacic acid, 3-(toluyl)-N-(1,1-dimethyl-2-hydroxyethyl)alanine (Saurbier et al, 1994), 3-(trimethoxysilyl) propanethiol-1 (Beccaria et al, 1994), cyclohexyl amine (Agres and Altsybeeva, 1990), dicyclohexylamine nitrite (Bastidas and Mora, 1998), benzoic acid (Agarwal and Landolt, 1998), ethanolamine (Andreev et al, 1997), thiophenol (Madhavan et al, 1998;Bouayed et al, 1999), imidazole derivatives (Stupnisek-Lisac et al, 1999), chromates (Jeffcoate et al, 1998;Khobaib et al, 1998;Cheng and The current issue and full text archive of this journal is available at www.emeraldinsight.com/0003-5599.htm Anti-Corrosion Methods and Materials 60/5 (2013) Luo, 1999), fatty acid esters (Krauss and Nmai, 1996), carboxylic acid (Malik, 1999), silicates , sulfonates (Sementsova et al, 1998), phosphates Bofardi, 1993), nitrates (Miglyachenko, 1992) and some commercial coolants (Anderson and Devereux, 1993).…”

Section: Introductionmentioning

confidence: 99%

Corrosion of inhibitor treated mild steel immersed in distilled water and a simulated salt solution

Malaibari

Anti-Corrosion Methods and Materials

Rauf

2013

Purpose -The purpose of this study was to investigate the performances of three inhibitors in controlling corrosion of local mild steel products in distilled water and a simulated salt solution. Design/methodology/approach -Corrosion inhibition of mild steel was investigated using electrochemical techniques. Untreated and inhibitor treated specimens were fully immersed in two test solutions, distilled water and the simulated solution of 2.0 wt.% NaCl and 1.0 wt.% Na2SO 4 . Findings -During full immersion in the simulated salt solution, sodium dihydrogen orthophosphate was not effective at all, resulting in even higher corrosion rates than that of the untreated specimens. Sodium benzoate was effective for three days only. Dicyclohexylamine nitrite was the most effective of them all, keeping its effectiveness for as much as 20 days. When the specimens were immersed in distilled water, all three inhibitors were effective during the 60 days of immersion while dicyclohexylamine nitrite and sodium benzoate treated specimens performed better than those treated with sodium dihydrogen orthophosphate. Originality/value -The objective of this research was to investigate the performances of three inhibitors -sodium dihydrogen orthophosphate (inorganic) at 10 mM concentration, dicyclohexylamine nitrite (organic) and sodium benzoate (organic) at 100 mM concentration -in controlling the corrosion of local mild steel products fully immersed in two test solutions, distilled water and the simulated salt solution. All three inhibitors are film forming and anodic type inhibitors. According to the authors' literature review, this study is original and will add value to the studies of inhibition of steel corrosion under similar environments.

“…[1] Various inhibitors that can help in protection against metal corrosion in aqueous environments were reported in the literature. Among them are 3-(toluyl)-N-(1,1-dimethyl-2-hydroxyethyl)-alanine known as toluylalanine, [2] 3-(trimethoxysilyl) propanethiol-1, [3] cyclohexyl amine, [4] dicyclohexylamine nitrite, [5] benzoic acid, [6] sebacic acid, [2] ethanolamine, [7] thiophenol, [8,9] imidazole derivatives, [10] chromates, [11][12][13] fatty acid esters, [14] carboxylic acid, [15] benzoates, [2] sulfonates, [16] silicates, [12] phosphates, [12,17] nitrites, [2] nitrates, [18] and some commercial coolants. [19] The role of inhibitors can be due to adsorption of phase layers on the metal surface or by the interaction with one of several corrosion products to form a new protective phase, rather than by adsorption on the metal surface.…”

Section: Introductionmentioning

confidence: 99%

Inhibition of atmospheric corrosion of mild steel by sodium benzoate treatment

J. of Materi Eng and Perform

2002

The objective of this study was to evaluate the effectiveness of sodium benzoate as an inhibitor to slow down or prevent atmospheric corrosion/discoloration of the local mild steel during storage in the Arabian Gulf region. Test specimens were prepared from locally produced reinforcing steel products. The inhibitor solution was applied on steel specimens at a concentration of 100 mM for 1 day at room temperature. Wooden exposure racks were used to hold as-received and inhibitor-treated specimens during atmospheric exposure for different periods. Corrosion was evaluated through weight loss determination and electrochemical technique. As expected, the Arabian Gulf atmosphere was corrosive on the as-received local mild steel. On the other hand, treatment of steel with sodium benzoate lowered its corrosion rate during initial days of its exposure to atmosphere. However, atmospheric corrosion inhibition performance of sodium benzoate deteriorated with exposure time after 30 or more days of atmospheric exposure, and the corrosion rates of sodium benzoate-treated specimens reached that of the unprotected specimens at the end of 90 days of atmospheric exposure.