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Standard Test Method for Qualifying Coatings for Use on A490 Structural Bolts Relative to Hydrogen Embrittlement
Automaticky preložený názov:
Štandardná skúšobná metóda pre kvalifikačné Coatings na užívanie na A490 štrukturálnych skrutky vzhľadom k vodíkovej krehkosti
NORMA vydaná dňa 1.9.2012
Označenie normy: ASTM F2660-12
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.9.2012
Kód tovaru: NS-54329
Počet strán: 7
Približná hmotnosť: 21 g (0.05 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
environmental hydrogen embrittlement, galvanic potential, high strength bolts, hydrogen embrittlement, open circuit potential, salt solution, threshold stress, ICS Number Code 21.060.10 (Bolts, screws, studs)
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 A490 high strength structural bolts made of any steel composition permitted by the A490 specification. The test method measures the susceptibility of coated specimen bolts to the influence of an externally applied potential (see 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 A490 high strength structural bolt. 1.2 This test method shall qualify a coating system for use with any size of A490 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 A490 bolts manufactured to the maximum susceptible tensile strength values (see Table 1) of the bolt (see Section 1.4 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 and health practices and determine the applicability of regulatory limitations prior to use. |
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2. Referenced Documents | ||||||||||||||||||||||||||||||||||
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