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96218 NAPHTHENIC ACID CORROSION AND ITS CONTROL

Product Number: 51300-96218-SG
ISBN: 96218 1996 CP
Author: MICHEAL J. ZETLMEISL
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This paper first presents a brief description of naphthcnic acid corrosion and the main factors which influence its onset and severity. After a brief discussion of traditional control methods, it proceeds to a discussion of chemical inhibition, which is a relatively new control technique. Chemical inhibitors can be divided into two broad classifications: phosphorus-based and non-phosphorus-based. Three types of phosphorus-based inhibitors have been reported: amine-neutralized phosphate esters, alkaline earth phosphonate phenate sulfide plus trialkyl phosphate, and thiazolines plus di- and trialkyl phosphates. Non-phosphorus based inhibitors include: thiazolines, organic polysulfides, and sulfonated akyl phenols. A description of each inhibitor and its effectiveness in the laboratory and field is presented. Keywords: naphthenic acid, corrosive liquids, high temperature corrosion, inhibitors, phosphates, phosphites, phosphonate phenate sulfides, thiazolines, organic polysuifides sulfonated alkyl phenols
This paper first presents a brief description of naphthcnic acid corrosion and the main factors which influence its onset and severity. After a brief discussion of traditional control methods, it proceeds to a discussion of chemical inhibition, which is a relatively new control technique. Chemical inhibitors can be divided into two broad classifications: phosphorus-based and non-phosphorus-based. Three types of phosphorus-based inhibitors have been reported: amine-neutralized phosphate esters, alkaline earth phosphonate phenate sulfide plus trialkyl phosphate, and thiazolines plus di- and trialkyl phosphates. Non-phosphorus based inhibitors include: thiazolines, organic polysulfides, and sulfonated akyl phenols. A description of each inhibitor and its effectiveness in the laboratory and field is presented. Keywords: naphthenic acid, corrosive liquids, high temperature corrosion, inhibitors, phosphates, phosphites, phosphonate phenate sulfides, thiazolines, organic polysuifides sulfonated alkyl phenols
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