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Cathodic Protection -Based Solutions For Corrosion Prevention Of “Green Aluminum” Alloys

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In the recent years, the reduction of the environmental footprint of industrial processes is gaining momentum, targeting the carbon neutrality. This also involves Aluminum industry, in which the use of secondary (e.g. recycled) alloys is a possible solution in order to decrease the greenhouse gases (GHG) emissions. Indeed, raw materials produced starting from secondary Aluminum show GHG emission values up to one order of magnitude lower with respect to their primary equivalents.

Product Number: 51322-17823-SG
Author: Marco Bandiera, Arianna Pavesi, Alessandro Mancini, Bozhena Tsyupa, Andrea Bonfanti, Massimiliano Bestetti, Federico Bertasi
Publication Date: 2022
Industry: Cathodic Protection
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The manuscript investigates the use of cathodic protection -based strategies (e.g. sacrificial anodes) to prevent corrosion phenomena of two green (e.g. recycled) 43200 and 46400 Aluminum alloys. These materials are selected due to their high concentration of alloying elements (e.g. Si, Cu, Fe) that renders them as a representative example of the typical composition of secondary Aluminums. Voltammetry and zero resistance ammeter (ZRA) -based methods are used to: a) asses the protection capability of Zinc-based sacrificial anodes; and b) experimentally determine the amount of Zinc required to cathodically protect a certain surface area of each investigated material for a specific period of time. As a further level of analysis, the manuscript investigates the protection capability of sacrificial anodes when coupled with an anodized secondary alloy. It is demonstrated that, in the case of highly alloyed Aluminums, cathodic protection can provide competing advantages with respect to conventional anodization treatments.

The manuscript investigates the use of cathodic protection -based strategies (e.g. sacrificial anodes) to prevent corrosion phenomena of two green (e.g. recycled) 43200 and 46400 Aluminum alloys. These materials are selected due to their high concentration of alloying elements (e.g. Si, Cu, Fe) that renders them as a representative example of the typical composition of secondary Aluminums. Voltammetry and zero resistance ammeter (ZRA) -based methods are used to: a) asses the protection capability of Zinc-based sacrificial anodes; and b) experimentally determine the amount of Zinc required to cathodically protect a certain surface area of each investigated material for a specific period of time. As a further level of analysis, the manuscript investigates the protection capability of sacrificial anodes when coupled with an anodized secondary alloy. It is demonstrated that, in the case of highly alloyed Aluminums, cathodic protection can provide competing advantages with respect to conventional anodization treatments.

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Product Number: 51322-17655-SG
Author: Jamey Hilleary
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Product Number: 51322-18035-SG
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Corrosion has long been recognized as an extremely costly naturally occurring phenomenon that can be controlled through the proper application of corrosion prevention and control methods protecting public safety, extending the service life of assets and preventing damage to property and the environment.  The landmark Cost of Corrosion Study published by the U.S. Federal Highway Administration estimated that corrosion costs were approximately 3.1% of the nation’s GDP.  Within the study, several key sectors of the US economy were studied.  This paper is focused on one of those areas – the corrosion risks associated with storage tanks that contain hazardous materials.  The study determined that the annual direct cost of corrosion for above ground hazardous material storage tanks (ASTs) in the US was ~$4.5 billion. 
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Product Number: 51317--9353-SG
ISBN: 9353 2017 CP
Author: Marco Ormellese
Publication Date: 2017
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In this paper, a preliminary study of the effect of intermittent CP has been carried out in order to investigate the effect of a temporary current interruption on the potential monitoring and on the residual corrosion of the metal.

 
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