ASTM E937-93(R2020) pdf free download
ASTM E937-93(R2020) pdf free download.Standard Test Method for Corrosion of Steel by Sprayed Fire-Resistive Material (SFRM) Applied to Structural Members
1. Scope
1.1 This test method covers a procedure for measuring the corrosion to steel induced by sprayed fire-resistive material. 1.2 These SFRMs include sprayed fibrous and cementitious materials applied directly in contact with the structural mem- bers. 1.3 This test method is applicable only to laboratory proce- dures. 1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.6 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards: 2 E119 Test Methods for Fire Tests of Building Construction and Materials E605/E605M Test Methods for Thickness and Density of Sprayed Fire-Resistive Material (SFRM) Applied to Structural Members E631 Terminology of Building Constructions
3. Terminology
3.1 Definitions—Definitions in this test method are in ac- cordance with Terminology E631. 3.2 Definitions ofTerms Specific to This Standard: 3.2.1 corrosion—chemical reaction between a metal and its environment that produces a deterioration of the metal and its properties. 3.2.2 sprayed fire-resistive materials—materials that are sprayed onto substrates to provide fire-resistive protection of the substrates.
4. Summary of Test Method
4.1 In this test method replicate panels ofbare, shop-coated, and galvanized steel are sprayed with SFRM and subjected to room temperature and humidity conditions and to 240 h of conditioning in a temperature- and humidity-controlled cham- ber. Corrosion induced under these conditions is determined by weight loss 3 of the sheets as related to sheets not so condi- tioned.
5. Significance and Use
5.1 It is the intent of this test method to determine relative corrosive properties of direct applied SFRM that provides an indication ofserviceability. Satisfactory performance ofSFRM applied to structural members and assemblies depends upon its ability to withstand the various influences that occur during the life of the structure, as well as upon its satisfactory perfor- mance under fire conditions. 5.2 This test method evaluates the relative corrosion ofsteel induced by SFRM and determines whether the presence of SFRM increases, decreases, or has no effect on the corrosion characteristics of steel.
6. Apparatus
6.1 Standard Temperature Humidity Cabinet, equipped to maintain the temperature at 35 °C 6 1.7 °C [95 °F 6 3 °F] and a relative humidity of 95 % 6 3 %. The cabinet and all accessories shall be of a material that does not affect the corrosiveness ofthe atmosphere in the cabinet. Additionally, all parts that come into contact with the test specimens shall be made of material that will not cause electrolytic corrosion. Adequate circulation of the atmosphere over the specimens shall be provided. 6.2 Scale, having a capacity of 5 kg and a sensitivity of 60.1 g. 6.3 Wire Brush, described as “cement mold brush” with brass wire bristles 25 mm [1 in.] long mounted in a handle. The bristle section shall be 127 mm [5 in.] long by 19 mm [ 3 ⁄ 4 in.] wide.
