1、Designation:C161715Standard Practice forQuantitative Accelerated Laboratory Evaluation ofExtraction Solutions Containing Ions Leached from ThermalInsulation on Aqueous Corrosion of Metals1This standard is issued under the fixed designation C1617;the number immediately following the designation indic
2、ates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers procedures for a quantitative
3、 accel-erated laboratory evaluation of the influence of extractionsolutions containing ions leached from thermal insulation onthe aqueous corrosion of metals.The primary intent of thepractice is for use with thermal insulation and associatedmaterials that contribute to,or alternatively inhibit,the a
4、queouscorrosion of different types and grades of metals due to solubleions that are leached by water from within the insulation.Thequantitative evaluation criteria are Mass Loss Corrosion Rate(MLCR)expressed in mils per year determined from theweight loss due to corrosion of exposed metal coupons af
5、terthey are cleaned.1.2 The insulation extraction solutions prepared for use inthe test can be altered by the addition of corrosive ions to thesolutions to simulate contamination from an external source.Ions expected to provide corrosion inhibition can be added toinvestigate their inhibitory effect.
6、1.3 Prepared laboratory standard solutions are used asreference solutions and controls,to provide a means ofcalibration and comparison.See Fig.1 and Table 1.1.4 Other liquids can be tested for their potential corrosive-ness including cooling tower water,boiler feed,and chemicalstocks.Added chemical
7、inhibitors or protective coatings ap-plied to the metal can also be evaluated using the generalguidelines of the practice.1.5 This practice cannot cover all possible field conditionsthat contribute to aqueous corrosion.The intent is to provide anaccelerated means to obtain a non-subjective numeric v
8、alue forjudging the potential contribution to the corrosion of metalsthat can come from ions contained in thermal insulationmaterials or other experimental solutions.The calculatednumeric value is the mass loss corrosion rate.This calculationis based on general corrosion spread equally over the test
9、duration and the exposed area of the experimental cells createdfor the test.Corrosion found in field situations and thisaccelerated test also involves pitting and edge effects and therate changes over time.1.6 The values stated in inch-pound units are to be regardedas standard.The values given in pa
10、rentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.7 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-priat
11、e safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2A53/A53M Specification for Pipe,Steel,Black and Hot-Dipped,Zinc-Coated,Welded and SeamlessA105/A105M Specification for Carbon Steel Forgings forPiping Appli
12、cationsC168 Terminology Relating to Thermal InsulationC518 Test Method for Steady-State Thermal TransmissionProperties by Means of the Heat Flow Meter ApparatusC665 Specification for Mineral-Fiber Blanket Thermal Insu-lation for Light Frame Construction and ManufacturedHousingC692 Test Method for Ev
13、aluating the Influence of ThermalInsulations on External Stress Corrosion Cracking Ten-dency of Austenitic Stainless SteelC739 Specification for Cellulosic Fiber Loose-Fill ThermalInsulationC795 Specification for Thermal Insulation for Use in Con-tact with Austenitic Stainless Steel1This practice is
14、 under the jurisdiction of ASTM Committee C16 on ThermalInsulation and is the direct responsibility of Subcommittee C16.31 on Chemical andPhysical Properties.Current edition approved March 1,2015.Published April 2015.Originallyapproved in 2005.Last previous edition approved in 2009 as C161709.DOI:10
15、.1520/C1617-15.2For 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,
16、PO Box C700,West Conshohocken,PA 19428-2959.United States1 C871 Test Methods for Chemical Analysis of Thermal Insu-lation Materials for Leachable Chloride,Fluoride,Silicate,and Sodium IonsD609 Practice for Preparation of Cold-Rolled Steel Panelsfor Testing Paint,Varnish,Conversion Coatings,andRelated Coating ProductsG1 Practice for Preparing,Cleaning,and Evaluating Corro-sion Test SpecimensG16 Guide for Applying Statistics to Analysis of CorrosionDataG31 Guide for Laboratory Immersion Corrosion