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Significance and Use
4.1 This test method describes the testing procedure that shall be used to qualify a coating system that is under consideration for use on ASTM Grade high strength structural bolts made of any steel composition permitted by the specification for Grade bolts. The test method measures the susceptibility of coated specimen bolts to the influence of an externally applied potential (see ) by testing for the threshold of embrittlement in a salt solution environment.
1.1 This test method defines the procedures and tests to evaluate the effect of a coating system on the susceptibility to environmental hydrogen embrittlement (EHE) of an ASTM Grade high strength structural bolt.
1.2 This test method shall qualify a coating system for use with any size of Grade bolts (that is, 1/2 to 1-1/2 in.) high strength structural bolts, relative to EHE.
1.3 The characteristic to be evaluated by this test method is the susceptibility to EHE caused by hydrogen generated from corrosion protection of the steel bolt by sacrificial galvanic corrosion of the coating. Testing shall be performed on coated, specimen ASTM Grade bolts manufactured to the maximum susceptible tensile strength values (see ) of the bolt (see Section Specimen Bolt Requirements). The internal hydrogen embrittlement (IHE) susceptibility will also be inherently evaluated when the EHE is tested through this test method. There is no need for a separate IHE susceptibility test.
1.4 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard.
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 appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
E4 Practices for Force Verification of Testing Machines
E8/E8M Test Methods for Tension Testing of Metallic Materials
F519 Test Method for Mechanical Hydrogen Embrittlement Evaluation of Plating/Coating Processes and Service Environments
F606/F606M Test Methods for Determining the Mechanical Properties of Externally and Internally Threaded Fasteners, Washers, Direct Tension Indicators, and Rivets
F1624 Test Method for Measurement of Hydrogen Embrittlement Threshold in Steel by the Incremental Step Loading Technique
F1789 Terminology for F16 Mechanical Fasteners
F2078 Terminology Relating to Hydrogen Embrittlement Testing
F3125 Specification for High Strength Structural Bolts and Assemblies, Steel and Alloy Steel, Heat Treated, Inch Dimensions 120 ksi and 150 ksi Minimum Tensile Strength, and Metric Dimensions 830 MPa and 1040 MPa Minimum Tensile Strength
G3 Practice for Conventions Applicable to Electrochemical Measurements in Corrosion Testing
G15 Terminology Relating to Corrosion and Corrosion Testing
G44 Practice for Exposure of Metals and Alloys by Alternate Immersion in Neutral 3.5 % Sodium Chloride Solution
G82 Guide for Development and Use of a Galvanic Series for Predicting Galvanic Corrosion Performance
International Standards Organization (ISO)ISO 17025
Other ReferencesTownsend Jr., H. E., Met Trans, V6A, April, 1976
Research Council on Structural ConnectionsSpecification for Structural Joints Using High Str Allowable Stress Design Specification for Structural Joints Using High Str Load and Resistance Factor Design
ICS Number Code 21.060.10 (Bolts, screws, studs)
UNSPSC Code 23153800(Coating systems)
|Link to Active (This link will always route to the current Active version of the standard.)|
ASTM F2660-20, Standard Test Method for Qualifying Coatings for Use on F3125 Grade A490 Structural Bolts Relative to Environmental Hydrogen Embrittlement, ASTM International, West Conshohocken, PA, 2020, www.astm.orgBack to Top