γ‐rays irradiation for preparation of some organic corrosion inhibitors and production of highly adhering anti‐corrosive varnishes of superior protective properties

1996 ◽  
Vol 43 (4) ◽  
pp. 18-26 ◽  
Author(s):  
M.S. Ibrahim ◽  
R.M. Mohsen ◽  
S.M. El‐Sawy
Keyword(s):  
Corrosion Inhibitors ◽  
Protective Properties ◽  
Γ Rays ◽  
Organic Corrosion Inhibitors

scholarly journals Study on efficiency of corrosion inhibitors based on derivatives of isothiuronic salts

2021 ◽  
Vol 11 (2) ◽  
pp. 326-332
Author(s):  
I. A. Ushakov ◽  
V. S. Nikonova ◽  
I. V. Polynskii ◽  
L. G. Knyazeva ◽  
M. M. Polynskaya ◽  
...  
Keyword(s):  
Organic Compounds ◽  
Corrosion Inhibitors ◽  
Covalent Bonds ◽  
Protective Properties ◽  
Nickel Coatings ◽  
Layer Adsorption ◽  
Steel 20 ◽  
Organic Corrosion Inhibitors ◽  
Derivatives Of ◽  
Active Centres

Metals play a pivotal role in industry; their use constantly grows. It is virtually impossible to find an industrial field without the use of metals and their alloys. However, owing to the quality degradation of metal during the operational process, corrosion appears not only on its surface but also under a coating, which leads to its destruction. To avoid this, corrosion inhibitors are necessary. Organic compounds have been widely used as corrosion inhibitors. Many organic corrosion inhibitors have been developed nowadays. In the literature, organic compounds comprising N, O, S and P heteroatoms are described, which reduce corrosion rate. The organic compounds are adsorbed on the metal surface, forming a thin layer. Adsorption occurs either through electrostatic interaction or, in some cases, the formation of covalent bonds. The work aimed to study isothiuronic salts as corrosion inhibitors to evaluate their protective properties using the polarisation curves method. Objects of research were isothiuronic compounds containing two active centres separated by saturated and unsaturated carbon bonds (structures 1-3). In structures 4-7, one isothiuronic fragment has different propylene substituting groups. It has been previously shown that these compounds can act as effective brightening agents when applying nickel coatings. A model solution with a density of 1.12 g/cm3 was prepared to study the corrosion inhibitors. The corrosion inhibitor concentration was 400 mg/L. Studies have shown that the compounds with two isothiuronic moieties do not always exhibit improved properties for inhibiting metal degradation in a corrosive environment. In particular, they showed worsening of the inhibiting properties for samples made of steel 20 and identical properties for that made of steel 3.

scholarly journals Toward understanding the adsorption mechanism of large size organic corrosion inhibitors on an Fe(110) surface using the DFTB method

RSC Advances ◽  
2017 ◽  
Vol 7 (46) ◽  
pp. 29042-29050 ◽  
Author(s):  
Lei Guo ◽  
Chengwei Qi ◽  
Xingwen Zheng ◽  
Renhui Zhang ◽  
Xun Shen ◽  
...  
Keyword(s):  
Metal Surface ◽  
Corrosion Inhibitors ◽  
Adsorption Mechanism ◽  
Large Size ◽  
Organic Corrosion Inhibitors

Compared with the conventional DFT approach, SCC-DFTB method is more effective to deal with the adsorption issues of large size organic corrosion inhibitors on metal surface.

Experimental and theoretical study of organic corrosion inhibitors on iron in acidic medium

1998 ◽  
Vol 41 (3) ◽  
pp. 501-517 ◽  
Author(s):  
M. Bouayed ◽  
H. Rabaa ◽  
A. Srhiri ◽  
J.-Y. Saillard ◽  
A.Ben Bachir ◽  
...  
Keyword(s):  
Acidic Medium ◽  
Corrosion Inhibitors ◽  
Theoretical Study ◽  
Organic Corrosion Inhibitors

scholarly journals Greener Approach towards Corrosion Inhibition

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Neha Patni ◽  
Shruti Agarwal ◽  
Pallav Shah
Keyword(s):  
Heavy Metals ◽  
Amino Acids ◽  
Plant Extracts ◽  
Corrosion Inhibitors ◽  
Organic Dyes ◽  
Plant Origin ◽  
Toxic Compounds ◽  
Green Inhibitors ◽  
Protective Films ◽  
Organic Corrosion Inhibitors

Corrosion control of metals is technically, economically, environmentally, and aesthetically important. The best option is to use inhibitors for protecting metals and alloys against corrosion. As organic corrosion inhibitors are toxic in nature, so green inhibitors which are biodegradable, without any heavy metals and other toxic compounds, are promoted. Also plant products are inexpensive, renewable, and readily available. Tannins, organic amino acids, alkaloids, and organic dyes of plant origin have good corrosion-inhibiting abilities. Plant extracts contain many organic compounds, having polar atoms such as O, P, S, and N. These are adsorbed on the metal surface by these polar atoms, and protective films are formed, and various adsorption isotherms are obeyed. Various types of green inhibitors and their effect on different metals are mentioned in the paper.

Effect of Organic Corrosion Inhibitors on Corrosion Fatigue

CORROSION ◽  
1967 ◽  
Vol 23 (3) ◽  
pp. 65-71 ◽  
Author(s):  
PARVIZ MEHDIZADEH ◽  
R. L. McGLASSON ◽  
J. E. LANDERS
Keyword(s):  
Corrosion Fatigue ◽  
Diesel Fuel ◽  
Corrosion Inhibitors ◽  
Fatigue Cracks ◽  
Material Surface ◽  
Significant Protection ◽  
Inhibitor Concentration ◽  
Degree Of Protection ◽  
Organic Inhibitors ◽  
Organic Corrosion Inhibitors

Abstract The effect of organic inhibitors on corrosion fatigue performance of steel in a mixture of brine containing H2S-CO2 and diesel fuel is reported. The inhibitor concentration required to give significant protection to steel under corrosion fatigue conditions is much higher than that for corrosion control. This is due to the fact that corrosion fatigue cracks initiated at incompletely protected spots on the material surface influence fatigue failure regardless of the degree of protection achieved on neighboring areas. Effects of fatigue stress and concentration of corrosion inhibitors were investigated. Results were analyzed in terms of the proposed mechanism for corrosion inhibition in these environments.

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