1、Designation:G5200(Reapproved 2016)1Standard Practice forExposing and Evaluating Metals and Alloys in SurfaceSeawater1This standard is issued under the fixed designation G52;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of
2、last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.1NOTEEditorially replaced Terminology G15 with Terminology G193 throughout in November 2016.1.Scope1.1 This practice covers conditions f
3、or the exposure ofmetals,alloys,and other materials in natural surface seawatersuch as those typically found in bays,harbors,channels,and soforth,2as contrasted with deep ocean testing.3This practicecovers full immersion,tidal zone and related splash,and sprayzone exposures.2,41.2 This practice sets
4、 forth general procedures that shouldbe followed in conducting seawater exposure tests so thatmeaningful comparisons may be made from one location toanother.1.3 This practice identifies recommended procedures forevaluating the effects of natural surface seawater on thematerials exposed.1.4 The value
5、s stated in SI units are to be regarded asstandard.The values given in parentheses are for informationonly.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and
6、health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:5D3623 Test Method for Testing Antifouling Panels in Shal-low SubmergenceG1 Practice for Preparing,Cleaning,and Evaluating Corro-sion Test SpecimensG30 Practice for Makin
7、g and Using U-Bend Stress-Corrosion Test SpecimensG38 Practice for Making and Using C-Ring Stress-Corrosion Test SpecimensG39 Practice for Preparation and Use of Bent-Beam Stress-Corrosion Test SpecimensG46 Guide for Examination and Evaluation of Pitting Cor-rosionG58 Practice for Preparation of Str
8、ess-Corrosion Test Speci-mens for WeldmentsG78 Guide for Crevice Corrosion Testing of Iron-Base andNickel-Base Stainless Alloys in Seawater and OtherChloride-Containing Aqueous EnvironmentsG193 Terminology and Acronyms Relating to Corrosion3.Terminology3.1 Terms relative to this subject matter can b
9、e found inTerminology G193.4.Significance and Use4.1 The procedures described herein are recommended forevaluating the corrosion or marine fouling behavior,or both,ofmaterials exposed to quiescent or local tidal flow conditions,orboth.4.1.1 This practice is not intended to cover the influence ofhigh
10、 seawater velocity or the behavior of materials in seawaterwhich has been transported from its source.1This practice is under the jurisdiction of ASTM Committee G01 on Corrosionof Metals,and is the direct responsibility of Subcommittee G01.09 on Corrosion inNatural Waters.Current edition approved No
11、v.1,2016.Published November 2016.Originallyapproved in 1976.Last previous edition approved in 2011 as G52 00(2011).DOI:10.1520/G0052-00R16E01.2Kirk,W.W.,and Pikul,S.J.,Seawater Corrosivity Around the World:Resultsfrom Three Years of Testing,ASTM STP 1086 Corrosion in Natural Waters,1990,pp.3-36.3Rei
12、nhart,F.M.,“Corrosion of Materials in Hydrospace,”Technical ReportR-304,U.S.Naval Civil Engineering Laboratory,Port Hueneme,CA,December1966.4Phull,B.S.,Pikul,S.J.,and Kain,R.M.,Seawater Corrosivity Around theWorld:Results from Five Years of Testing,ASTM STP 1300 Corrosion in NaturalWaters,Vol 2,1997
13、,pp.34-73.5For referenced ASTM standards,visit the ASTM website,www.astm.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.Copyright ASTM International,100 Barr Harbor Drive,PO Bo
14、x C700,West Conshohocken,PA 19428-2959.United States1 4.1.2 Some aspects of this practice may be applicable totesting in tanks and troughs which are continuously providedwith fresh surface seawater.Additionally,some aspects mayalso be applicable to deep ocean testing.NOTE1Guide G78 provides guidance
15、 for conducting crevice corro-sion tests under controlled seawater test conditions.4.2 While the duration of testing may be dictated by the testobjectives,exposures of more than six months or one year arecommonly used to minimize the effects of environmentalvariables associated with seasonal changes
16、 or geographiclocation,or both.4.3 The procedures described are applicable for the expo-sure of simple test panels,welded test panels,or thoseconfigured to assess the effects of crevices,or both,such asthose described in Guide G78.In addition,they are useful fortesting of actual components and fabricated assemblies.4.4 It is prudent to include control materials with knownresistance to seawater corrosion or fouling,or both,as de-scribed in Test Method D3623.NOTE2Materials which have been included