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Licensed Unlicensed Requires Authentication Published by De Gruyter May 1, 2013

Corrosion and Scale Inhibition Properties by Phosphate-free and Nitrogen-free Scale Inhibitor in Cooling Water System

Korrosions- und kalkinhibierende Eigenschaften phosphat- und stickstoff-freier Inhibitoren in Kühlwassersystemen
  • Huchuan Wang , Yuming Zhou , Guangqing Liu , Jingyi Huang , Qingzhao Yao , Shuaishuai Ma , Ke Cao , Yahui Liu , Yujie Tian , Wendao Wu , Wei Sun and Zhengjun Hu

Abstract

The corrosion and scale inhibition properties of acrylic acid-oxalic acid-allylpolyethoxy carboxylate (AA-APEM9) were investigated by determining the corrosion and scale inhibition efficiency, the Tafel polarization curve and significant control of CaCO3 scales. The AA-APEM9 exhibits the highest inhibition efficiency of 81.4 % when the carbon steel immersion in 3 % NaCl solution. AA-APEM9 possess excellent CaCO3 inhibition, approximately 70.2 % at threshold dosage of 6 mg/L. Compared to T-225, HPMA, PAA, PESA, AA-APEM9, possessing PEG, shows a superior inhibitory efficiency. AA-APEM9 has the best inhibition because of possessing the greatest degree of polymerization of PEG among it. SEM and TEM images indicate that AA-APEM9 changes highly the morphology and size of CaCO3 crystals during the inhibition process. XRD analysis shows that the AA-APEM9 copolymer influence CaCO3 crystal crystallinity. AA-APEM9 may be a potentially useful corrosion and scale inhibitor in a cooling water system.

Kurzfassung

Die korrosions- und kalkinhibierenden Eigenschaften von Acrylsäure-Oxalsäure-Allylpolyethoxycarboxylat (AA-APEM9) wurden untersucht. Dazu wurden die Effizienz, Korrosion und Kalkablagerungen zu inhibieren, die Tafel-Polarisations-Kurve und die signifikante Kontrolle der CaCO3-Ablagerungen bestimmt. AA-APEM9 zeigte die höchste Inhibierungswirkung von 81,4 % an einem Stahl, der in eine 3 %ige NaCl-Lösung taucht. AA-APEM9 besitzt bei einer Schwellenkonzentratzion von 6 mg L–1 eine hervorragende CaCO3-Inhibierung von etwa 70,2 %. Im Vergleich zu T-225, HPMA, PAA, PESA verfügt AA-APEM9 über PEG-Gruppen und zeigt eine überlegene Leistung bei der Inhibierung. Der Grund für die beste Inhibierungswirkung von AA-APEM9 ist der hohe Polymerisationsgrad von PEG. SEM und TEM-Bilder deuten darauf hin, dass AA-APEM9 die Morphologie und die Größe der CaCO3-Kristalle während der Inhibierung verändern. Die XRD-Analyse zeigt, dass das AA-APEM9-Co-Polymer die Kristallinität des CaCO3-Kristalls beeinflusst. AA-APEM9 kann ein sehr nützlicher Korrosions- und Kalk-Inhibitor in einem Kühlwassersystem sein.


* Correspondence address Dr. Yuming Zhou, School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, P. R. China, Tel.: 86-25-52 09 06 17, E-Mail:

Huchuan Wang was born in 1986. He is a doctoral student at Southeast University. His main field of research is applications of water soluble polymers in industrial water systems and green chemicals.

Guangqing Liu was born in 1979. He is a doctoral student at Southeast University. His main field of research is applications of water soluble polymers in industrial water systems and green chemicals.

Jingyi Huang was born in 1976. She is a teacher at Southeast University. Her main field of research is applications of water soluble polymers in industrial water systems and green chemicals.

Prof. Yuming Zhou was born in 1964. He graduated from Nanjing University in 1986. He obtained his PhD in Department of Biomedical Southeast University. His research interests lie in organic material, fine chemicals and environmental protection. At the moment is associate dean of the School of Chemistry and Chemical Engineering Southeast University.

Qingzhao Yao was born in 1973. She is a associate professor at Southeast University. Her main field of research is applications of water soluble polymers in industrial water systems and green chemicals.

Shuaishuai Ma was born in 1987. He is a doctoral student at Southeast University. His main field of research is applications of water soluble polymers in industrial water systems and green chemicals.

Ke Cao was born in 1988. He is a postgraduate at Southeast University. His main field of research is applications of water soluble polymers in industrial water systems and green chemical.

Yahui Liu was born in 1987. He is a postgraduate at Southeast University. His main scientific interest has been the synthesis and properties of environment friendly materials.

Wendao Wu was born in 1985. He received his bachelor degree in applied chemical from Southeast University in 2008. He is now working at Jianghai Environmental Protection CO.,Ltd.,Changzhou. His field of research is synthesis and application of surfactants.

Wei Sun was born in 1979. He received his bachelor degree in applied chemical from Suzhou University in 2004. He is now working at Jianghai Environmental Protection CO.,Ltd.,Changzhou China. His main field of research is synthesis and application of surfactants.

Zhengjun Hu was born in 1988. He received his bachelor degree in applied chemical from Changzhou University in 2011. He is now working at Jianghai Environmental Protection CO., Ltd., Changzhou China. His main field of research is synthesis and application of surfactants.


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Received: 2013-07-29
Revised: 2013-11-07
Published Online: 2013-05-01
Published in Print: 2014-05-15

© 2014, Carl Hanser Publisher, Munich

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