1、Designation:G20510Standard Guide forDetermining Corrosivity of Crude Oils1This standard is issued under the fixed designation G205;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indi
2、cates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This guide presents some generally accepted laboratorymethodologies that are used for determining the corrosivity ofcrude oil.1.2 This guide does not cover detailed
3、calculations andmethods,but rather a range of approaches that have foundapplication in evaluating the corrosivity of crude oil.1.3 Only those methodologies that have found wide accep-tance in crude oil corrosivity evaluation are considered in thisguide.1.4 This guide does not address the change in o
4、il/water ratiocaused by accumulation of water at low points in a pipelinesystem.1.5 This guide is intended to assist in the selection ofmethodologies that can be used for determining the corrosivityof crude oil under conditions in which water is present in theliquid state(typically up to 100C).These
5、 conditions normallyoccur during oil and gas production,storage,and transportationin the pipelines.1.6 This guide does not cover the evaluation of corrosivityof crude oil at higher temperatures(typically above 300C)thatoccur during refining crude oil in refineries.1.7 This guide involves the use of
6、electrical currents in thepresence of flammable liquids.Awareness of fire safety iscritical for the safe use of this guide.1.8 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.9 This standard does not purport to address all of t
7、hesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D96 Test Method for Water and
8、Sediment in Crude Oil byCentrifuge Method(Field Procedure)(Withdrawn 2000)3D473 Test Method for Sediment in Crude Oils and Fuel Oilsby the Extraction MethodD665 Test Method for Rust-Preventing Characteristics ofInhibited Mineral Oil in the Presence of WaterD724 Test Method for Surface Wettability of
9、 Paper(Angle-of-Contact Method)(Withdrawn 2009)3D1125 Test Methods for Electrical Conductivity and Resis-tivity of WaterD1129 Terminology Relating to WaterD1141 Practice for the Preparation of Substitute OceanWaterD1193 Specification for Reagent WaterD4006 Test Method for Water in Crude Oil by Disti
10、llationD4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4377 Test Method for Water in Crude Oils by Potentiomet-ric Karl Fischer TitrationG1 Practice for Preparing,Cleaning,and Evaluating Corro-sion Test SpecimensG31 Practice for Laboratory Immersion Corrosion Testing ofMetalsG1
11、11 Guide for Corrosion Tests in High Temperature orHigh Pressure Environment,or BothG170 Guide for Evaluating and Qualifying Oilfield andRefinery Corrosion Inhibitors in the LaboratoryG184 Practice for Evaluating and Qualifying Oil Field andRefinery Corrosion Inhibitors Using Rotating Cage1This guid
12、e is under the jurisdiction of ASTM Committee G01 on Corrosion ofMetals and is the direct responsibility of Subcommittee G01.05 on LaboratoryCorrosion Tests.Current edition approved Sept.1,2010.Published October 2010.DOI:10.1520/G020510.2For referenced ASTM standards,visit the ASTM website,www.astm.
13、org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor
14、Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 G193 Terminology and Acronyms Relating to CorrosionG202 Test Method for UsingAtmospheric Pressure RotatingCage2.2 ISO Standard:4ISO 6614 Petroleum productsDetermination of WaterSeparability of Petroleum Oils and Synthetic Fluids2.3 NAC
15、E Standard:5TM0172 Standard Test Method Determining CorrosiveProperties of Cargoes in Petroleum Product Pipelines3.Terminology3.1 DefinitionsThe terminology used herein,if not spe-cifically defined otherwise,shall be in accordance with GuideG170,Terminology and Acronyms G193,and TerminologyD1129.Def
16、initions provided herein and not given in GuideG170,Terminology and Acronyms G193,and TerminologyD1129 are limited only to this guide.3.2 Definitions of Terms Specific to This Standard:3.2.1 emulsion,ntwo-phase immiscible liquid system inwhich one phase is dispersed as droplets in the other phase.3.2.2 emulsion-inversion point,npercentage of water atwhich a water-in-oil(W/O)emulsion converts into an oil-in-water(O/W)emulsion.3.2.3 wettability,ntendency of a liquid to wet or adhere onto a solid s
