Green corrosion inhibitors: amino acids and plant extracts
Elphick, D. and Ajayi, O. and Everitt, N.M. and Voisey, K.T. (2015) Green corrosion inhibitors: amino acids and plant extracts. In: European Federation of Corrosion Congress (Eurocorr 2015), 6-10 September 2015, Graz, Austria.
Corrosion inhibitors are chemicals that are used in many industries to control corro-sion. As they are injected into process streams they have to be continually replen-ished in order to maintain protection. Many chemicals used are environmentally un-friendly highly toxic compounds including chromates and arsenic compounds. REACH legislation and PARCOM recommendations as well as general environmen-tal concerns are driving an effort to find acceptable alternatives to conventional cor-rosion inhibitors. Promising initial work in the open literature has already identified several alternative green corrosion inhibitors, including plant extracts that have po-tential to be used as more environmentally acceptable corrosion inhibitors. However, to date a lot of the work has been done on a trial and error basis with little considera-tion of the mechanisms of inhibition or any detailed characterisation of the inhibited surface.
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