1、Designation:E152293(Reapproved 2013)Standard Specification forAutoclavable Protective Coatings on Laboratory Glassware1This standard is issued under the fixed designation E1522;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year
2、 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 specification covers the requirements for autocla-vable protective coatings on laboratory glassware up to andinclu
3、ding the 4L size.These coatings will not prevent theescape of liquids from vessels under pressure.2.Chemical Resistance2.1 The physical resistance(see 3.1)of the coating shall beacceptable after continuous exposure for one hour to acids,(other than chromic),alcohols,bases,aliphatic hydrocarbons(exce
4、pt as noted below)and oxidizing agents at room tempera-ture.The intent of the coating is to allow enough time afterbreakage for proper disposal,not for continued use.2.2 The coating shall not be required to withstand exposureto aldehydes,esters,aromatic hydrocarbons,halogenated hy-drocarbons or keto
5、nes.3.Physical Resistance3.1 The thickness and character of the undamaged coatingshall be such that it will not permit the immediate total loss ofliquid at 15C to 70C from a protected stoppered or cappedcontainer filled to rated capacity when dropped from a heightof 40 in.onto a floor made of18in.ma
6、ximum vinyl tile overconcrete,but will prevent the escape of glass.4.Autoclavability4.1 The coating shall withstand 15 min autoclave cycles at121C and 15 psig,although some air pockets under thecoating and some other surface depressions may becomepermanent.Some moisture may be absorbed through theco
7、ating during autoclaving and cause a slight clouding,but thisclouding must be removable by oven drying at not over 110C.Drying time will vary depending on size and configuration ofvessel.4.1.1 Coating life will vary depending on size and configu-ration of vessel and size and procedure of autoclave u
8、sed.Alsoallow coating to clear and dry before repeating autoclave cycle.4.2 CAUTION:Loosen or remove all caps or closuresbefore autoclaving and allow autoclave pressure to return tozero before removing glassware to minimize the formation ofair pockets under the coating.Also allow coating to clear an
9、ddry before repeating autoclave cycle.Vacuum drying maydistort the coating.5.Temperature5.1 This coating should not be exposed to dry heat above110C or moist heat above 121C.However,prolonged expo-sure to either dry or wet heat will cause discoloration andembrittlement.Discolored coatings may no lon
10、ger be usable.Manufacturers should be consulted for specific applications.6.Microwaving6.1 Containers filled with aqueous solutions and having drycoatings(no obvious moisture under or on them)shall with-stand microwaving provided that the 110C temperature limitis not exceeded.Wet coatings may develo
11、p steam pockets andcause the coatings to separate.6.1.1 Coating life will vary depending on size and configu-ration of vessel,temperature achieved and time at suchtemperature.6.2 CAUTION:Loosen or remove all caps or closuresbefore microwaving.7.Thermal Combustion7.1 Combustion of various coatings wi
12、ll result in the releaseof certain chemicals.Combustion of PVC,for example,willresult in the release of the major combustion products ofcarbon dioxide,carbon monoxide,hydrogen chloride andwater.Provision should be made to deal appropriately withsuch combustion products if combustion occurs.8.Flammab
13、ility8.1 The coating shall not ignite and burn when exposed toopen flame,hot electric heating elements or other sources ofheat that are capable of initiating combustion.9.Color9.1 The coating may be clear or colored at the option of themanufacturer.1This specification is under the jurisdiction of AS
14、TM Committee E41 onLaboratory Apparatus and is the direct responsibility of Subcommittee E41.01 onApparatus.Current edition approved Nov.1,2013.Published December 2013.Originallyapproved in 1993.Last previous edition approved in 2008 as E1522 93(2008).DOI:10.1520/E1522-93R13.Copyright ASTM Internati
15、onal,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 10.Keywords10.1 coatings;glassware;laboratory;protectiveASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard.Users of this
16、 standard are expressly advised that determination of the validity of any such patent rights,and the riskof infringement of such rights,are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised,either reapproved or withdrawn.Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters.Yo
