ASTM G202-12
ASTM G3-13
ASTM G30-97(2009)..
ASTM/NACE G31-12a..
ASTM G32-10
ASTM G33-99(2010)..
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ASTM G44-99(2013)
Standard Practice for Exposure of Metals and Alloys by Alternate Immersion in Neutral 3.5 % Sodium Chloride Solution
Automaticky přeložený název:
Standardní praxe pro expozici kovů a slitin náhradníky ponořením do Neutrální 3,5% roztoku chloridu sodného
NORMA vydána dne 1.5.2013
Informace o normě:
Označení normy: ASTM G44-99(2013)
Poznámka: NEPLATNÁ
Datum vydání normy: 1.5.2013
Kód zboží: NS-57692
Počet stran: 5
Přibližná hmotnost: 15 g (0.03 liber)
Země: Americká technická norma
Kategorie: Technické normy ASTM
Kategorie - podobné normy:
Anotace textu normy ASTM G44-99(2013) :
Keywords:
accelerated corrosion test, alternate immersion test, aluminum alloys, ferrous alloys, quality control test, sodium chloride solution, stress corrosion cracking, ICS Number Code 77.040.30 (Chemical analysis of metals)
Doplňující informace
| Significance and Use | ||||||||||||
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4.1 The 3.5 % NaCl alternate immersion procedure is a general, all-purpose procedure that produces valid comparisons for most metals, particularly when specimens are exposed at high levels of applied stress or stress intensity. 4.2 While the alternate immersion test is an accelerated test and is considered to be representative of certain natural conditions, it is not intended to predict performance in specialized chemical environments in which a different mode of cracking may be operative. For example, it does not predict the performance of aluminum alloys in highly acidic environments such as heated inhibited red fuming nitric acid (IRFNA). For such cases, the results of the alternate immersion test are of doubtful significance until a relationship has been established between it and anticipated service environments. 4.3 While this practice is applicable in some degree to all metals, it is not equally discriminative of all alloys, even within the same metal system. Consequently, information should be established to allow comparisons of performances of the alloy of interest in the alternate immersion test and in natural environments. 1.1 This practice covers procedures
for making alternate immersion stress corrosion tests in 3.5 %
sodium chloride (NaCl) (Note 1). It is primarily for tests of
aluminum alloys (Test Method G47) and ferrous alloys, but may be
used for other metals exhibiting susceptibility to chloride ions.
It sets forth the environmental conditions of the test and the
means for controlling them.
1.2 This practice can be used for
both stressed and unstressed corrosion specimens. Historically, it
has been used for stress-corrosion cracking testing, but is often
used for other forms of corrosion, such as uniform, pitting,
intergranular, and galvanic.
1.3 This practice is intended for alloy development and for applications where the alternate immersion test is to serve as a control test on the quality of successive lots of the same material. Therefore, strict test conditions are stipulated for maximum assurance that variations in results are attributable to variations in the material being tested. 1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 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 and health practices and determine the applicability of regulatory limitations prior to use. |
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| 2. Referenced Documents | ||||||||||||
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Podobné normy:
Historická
1.11.2012
Historická
1.12.2013
Historická
1.5.2009
Historická
1.7.2012
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1.12.2010
Historická
1.5.2010
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