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99105 ENVIRONMENTALLY SOUND CORROSION INHIBITORS FOR COOLING WATER

Picture for 99105 ENVIRONMENTALLY SOUND CORROSION INHIBITORS
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Product Number: 51300-99105-SG
ISBN: 99105 1999 CP
Author: Bernd Mayer, Wolfgang Hater and Matthias Schweinsberg
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Standard corrosion inhibitors for cooling water are based either on heavy metals, phosphates or phosphonates and therefore contribute to the contamination of surface water with noxious substances. Evaluations in pilot plants suggest that phosphorous-free organic carboxylic acids might be promising alternatives to the well-established phosphoric acids. The carboxylic compounds are biodegradable and therefore environmentally favorable. Moreover, in order to accelerate the evaluation of new inhibitors, an electrochemical test has been implemented which operates under conditions close to industrial practice. Results show that a combination of the electrochemical method with various corrosion tests from the laboratory up to pilot-plant scale yields a comprehensive characterization of the corrosion inhibiting properties. Consequently, the development of tailored inhibitor systems focused on specific applications is accelerated. Kewords: corrosion inhibitor, environmentally favorable, biodegradable, carboxylic acid, cooling water, electrochemistry, corrosion testing
Standard corrosion inhibitors for cooling water are based either on heavy metals, phosphates or phosphonates and therefore contribute to the contamination of surface water with noxious substances. Evaluations in pilot plants suggest that phosphorous-free organic carboxylic acids might be promising alternatives to the well-established phosphoric acids. The carboxylic compounds are biodegradable and therefore environmentally favorable. Moreover, in order to accelerate the evaluation of new inhibitors, an electrochemical test has been implemented which operates under conditions close to industrial practice. Results show that a combination of the electrochemical method with various corrosion tests from the laboratory up to pilot-plant scale yields a comprehensive characterization of the corrosion inhibiting properties. Consequently, the development of tailored inhibitor systems focused on specific applications is accelerated. Kewords: corrosion inhibitor, environmentally favorable, biodegradable, carboxylic acid, cooling water, electrochemistry, corrosion testing
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