Electromagnetic corrosion control in water cooling systems

Purpose – The aim was to study the effect of an electromagnetic treatment used on corrosion control of carbon steel in cooling systems. Design/methodology/approach – The aim was to assess the performance of an electromagnetic treatment used on corrosion control of carbon steel in cooling water systems. Findings – The main conclusion is that the electromagnetic system cannot induce a direct effect on the corrosion rates. The use of chemical corrosion inhibitors cannot be suggested. Social implications – The optimized industrial use of water is an objective of unquestionable importance, as water is a finite resource. The use of efficient corrosion control on water cooling systems permits the reduction of the water volume required. Consequently, a social benefit can be associated with the improvement of corrosion control technologies. Originality/value – The development of alternative corrosion control technologies, such as the use of physical treatments, has been considered as a promising tool. In this work, a consistent assessment of the results achieved on a full-scale system, without using chemical corrosion inhibitors, is presented.

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Study of corrosion of copper in industrial cooling systems

International Journal of Structural Integrity ◽

10.1108/ijsi-10-2013-0039 ◽

2015 ◽

Vol 6 (5) ◽

pp. 617-635 ◽

Cited By ~ 4

Author(s):

Ioannis A Kartsonakis ◽

Elias P. Koumoulos ◽

Antonis Karantonis ◽

Costas A. Charitidis ◽

S Dessypris ◽

...

Keyword(s):

Design Methodology ◽

Corrosion Inhibitors ◽

Electrochemical Impedance ◽

Electrochemical Techniques ◽

Water Cooling ◽

Optimum Structure ◽

Copper Corrosion ◽

Cooling Systems ◽

Content Type ◽

Industrial Systems

Purpose – The purpose of this paper is to perform the evaluation of copper susceptibility to corrosion in industrial cooling systems. Microstructure and defects of copper are observed, while divergences from optimum structure are discussed. Design/methodology/approach – Various types of corrosion are examined. Electrochemical techniques such as electrochemical impedance spectroscopy and potentiodynamic polarisation are applied in these materials, using corrosion inhibitors. Microscopic observations and electrochemical measurements are interpreted according to possible mechanistic scenarios. Findings – It is evident that, under specific conditions (e.g. high pH), water cooling ingredients can enhance corrosion, leading to significant copper mass loss from the inner surface of the pipe and thus leading to failure. Originality/value – Evaluation of copper corrosion in cooling industrial systems was done, as well as studies of copper corrosion in sodium chloride.

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Corrosion inhibition of some azole derivatives on carbon steel in hydrochloric acid solution

Anti-Corrosion Methods and Materials ◽

10.1108/acmm-05-2013-1266 ◽

2014 ◽

Vol 61 (5) ◽

pp. 300-306 ◽

Cited By ~ 6

Author(s):

B.P. Markhali ◽

R. Naderi ◽

M. Sayebani ◽

M. Mahdavian

Keyword(s):

Carbon Steel ◽

Hydrochloric Acid ◽

Organic Compounds ◽

Corrosion Inhibitors ◽

Inhibition Efficiency ◽

Electrochemical Impedance ◽

Acid Corrosion ◽

Molecular Structures ◽

Inhibition Mechanism ◽

Content Type

Purpose – The purpose of this paper is investigate the inhibition efficiency of three similar bi-cyclic organic compounds, namely, benzimidazole (BI), benzotriazole (BTAH) and benzothiazole (BTH) on carbon steel in 1 M hydrochloric acid (HCl) solution. Organic inhibitors are widely used to protect metals in acidic media. Among abundant suggestions for acid corrosion inhibitors, azole compounds have gained attention. Design/methodology/approach – The inhibition efficiency of the three organic compounds was investigated using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). Findings – Superiorities of BTH and BTAH corrosion inhibitors were shown by EIS data and polarization curves. Moreover, the results revealed that BTAH and BTH can function as effective mixed-type adsorptive inhibitors, whereas no inhibition behavior was observed for BI. Both BTAH and BTH obeyed Longmuir adsorption isotherm. The results obtained from this isotherm showed that both inhibitors adsorbed on the specimen surface physically and chemically. The difference in inhibition efficiencies of BTAH, BTH and BI was related to the presence of nitrogen and sulfur hetero atoms on their molecular structures. Originality/value – This study evaluated inhibition efficiency of BI, BTAH and BTH using electrochemical methods. In addition, the study attempted to find inhibition mechanism of the inhibitors and to find modes of adsorption of the inhibitors, correlating effects of heteroatoms and inhibition efficiency.

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Evaluation of corrosion inhibitors in acid medium

Anti-Corrosion Methods and Materials ◽

10.1108/acmm-12-2013-1329 ◽

2015 ◽

Vol 62 (4) ◽

pp. 241-245

Author(s):

Fernando Benedicto Mainier ◽

Raphaela de Melo Baêsso e Silva

Keyword(s):

Carbon Steel ◽

Corrosion Inhibitor ◽

Acid Medium ◽

Design Methodology ◽

Corrosion Inhibitors ◽

Experimental Conditions ◽

Content Type ◽

Steel Pipes ◽

Kinetics Of

Purpose – The purpose of this paper is to evaluate the corrosion inhibitor performance in acid medium through the determination of Fe2+ ions present based on reaction kinetics of steel with the acid. The use of corrosion inhibitors has been an excellent technique for protecting carbon steel pipes acidizing operations in oil wells. The inhibitor forms a chemical barrier on the metal surface that prevents or reduces attack by the acidic media. Design/methodology/approach – The experimental study provides a methodology to evaluate the performance of corrosion inhibitors in an acid medium, preferentially of concentrated hydrochloric acid. The process consists essentially of total immersion coupons of carbon steel, with continuous stirring, controlled temperature and quantitative determinations of iron ions from the dissolution of steel. The additions of commercial corrosion inhibitor base of ethoxylated amines of high molecular weight in an acid medium showed excellent performance at a temperature ranging from 25 to 45°C. Findings – This paper presents the mechanisms of protection, performance graphs and calculations of the activation energies of the addition of corrosion inhibitors in an acidic medium. Originality/value – The originality of this essay is to evaluate and correlate the performance of corrosion inhibitors with the activation energy in experimental conditions.

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