By Alec Groysman
This publication addresses corrosion difficulties and their options at amenities within the oil refining and petrochemical undefined, together with cooling water and boiler feed water devices. additional, it describes and analyzes corrosion keep an eye on activities, corrosion tracking, and corrosion administration. Corrosion difficulties are a perennial factor within the oil refining and petrochemical undefined, as they result in a deterioration of the useful houses of metal gear and damage the surroundings – either one of which have to be safe for the sake of present and destiny generations. therefore, this publication examines and analyzes common and bizarre corrosion failure situations and their prevention at refineries and petrochemical amenities, together with issues of: pipelines, tanks, furnaces, distillation columns, absorbers, warmth exchangers, and pumps. additionally, it describes naphthenic acid corrosion, pressure corrosion cracking, hydrogen damages, sulfidic corrosion, microbiologically brought on corrosion, erosion-corrosion, and corrosion fatigue taking place at refinery devices. finally, fouling, corrosion and cleansing are mentioned during this book.
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Extra resources for Corrosion Problems and Solutions in Oil Refining and Petrochemical Industry
Usually this happens in air coolers but can take place before, even in upper part of the distillation column under faulty operation. Therefore, it is very important to maintain temperature in the overhead of distillation column 20–30 °C more than water dew point at atmospheric pressure. 1). During desalter fault and the presence of organochlorine compounds in crude oil pH values may be even less. Intensive corrosion of carbon steel begins at pH < 4 . This means that the acid water condensate should be neutralized (see Sect.
J Chem Educ 37(11):554–561 22. Nelson WL (1958) Petroleum reﬁnery engineering, 4th edn. McGraw-Hill Book Co, New York Chapter 3 Physicochemical Basics of Corrosion at Reﬁneriesʼ Units Only fools and charlatans know everything and understand everything. Anton Chekhov (1860–1904), a Russian writer. Abstract Physicochemical mechanisms of metal corrosion at reﬁneriesʼ units are described. Low- (T < 100 °C) and high- (T > 200 °C) temperature corrosion problems are analyzed. Corrosion by hydrochloric acid and its prevention, electrochemical mechanism of corrosion in acid, neutral and alkali aqueous solutions of electrolytes are explained.
The contaminants have consumed the majority of the sodium hydroxide and the caustic solution is spent. Thus, when H2S gas is scrubbed by aqueous NaOH solution to form two salts NaHS and Na2S, caustic soda is consumed. Spent caustic at reﬁnery comes from the Merox processing: removing of mercaptans from LPG, light naphtha or gasoline, and kerosene/jet fuel. In these media, sulﬁdes and organic acids are removed from the product streams into the aqueous caustic phase. The sodium hydroxide is consumed and resulting wastewaters (cresylic for gasoline; naphthenic for kerosene; sulﬁdic for LPG— spent caustics) are mixed and called reﬁnery spent caustic.