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Standard Guide for Crevice Corrosion Testing of Iron-Base and Nickel-Base Stainless Alloys in Seawater and Other Chloride-Containing Aqueous Environments
Automaticky preložený názov:
Štandardné Sprievodca pre štrbinové korózii skúšanie Iron - báza a nikel - základ z nerezovej zliatiny v morskej vode a ďalších obsahujúcich chloridy vodnom prostredí
NORMA vydaná dňa 1.5.2007
Označenie normy: ASTM G78-01(2007)
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.5.2007
Kód tovaru: NS-57823
Počet strán: 8
Približná hmotnosť: 24 g (0.05 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
aqueous, chloride, corrosion, crevice, iron base, nickel-base, testing, ICS Number Code 77.060 (Corrosion of metals)
Significance and Use | ||||||||||
This guide covers procedures for crevice-corrosion testing of iron-base and nickel-base stainless alloys in seawater. The guidance provided may also be applicable to crevicecorrosion testing in other chloride containing natural waters and various laboratory prepared aqueous chloride environments. This guide describes the use of a variety of crevice formers including the nonmetallic, segmented washer design referred to as the multiple crevice assembly (MCA) as described in 9.2.2. In-service performance data provide the most reliable determination of whether a material would be satisfactory for a particular end use. Translation of laboratory data from a single test program to predict service performance under a variety of conditions should be avoided. Terms, such as immunity, superior resistance, etc., provide only a general and relatively qualitative description of an alloy’corrosion performance. The limitations of such terms in describing resistance to crevice corrosion should be recognized. While the guidance provided is generally for the purpose of evaluating sheet and plate materials, it is also applicable for crevice-corrosion testing of other product forms, such as tubing and bars. The presence or absence of crevice corrosion under one set of conditions is no guarantee that it will or will not occur under other conditions. Because of the many interrelated metallurgical, environmental, and geometric factors known to affect crevice corrosion, results from any given test may or may not be indicative of actual performance in service applications where the conditions may be different from those of the test. |
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1. Scope | ||||||||||
1.1 This guide covers information for conducting crevice-corrosion tests and identifies factors that may affect results and influence conclusions. 1.2 These procedures can be used to identify conditions most likely to result in crevice corrosion and provide a basis for assessing the relative resistance of various alloys to crevice corrosion under certain specified conditions. 1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 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. For a specific warning statement, see 7.1.1. |
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2. Referenced Documents | ||||||||||
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