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Standard Test Method for Conducting Cyclic Galvanostaircase Polarization
STANDARD published on 1.11.2015
Designation standards: ASTM G100-89(2015)
Note: WITHDRAWN
Publication date standards: 1.11.2015
SKU: NS-622001
The number of pages: 4
Approximate weight : 12 g (0.03 lbs)
Country: American technical standard
Category: Technical standards ASTM
Keywords:
aluminum, corrosion, electrochemical measurement, galvanostaircase, localized corrosion, polarization,, ICS Number Code 25.220.20 (Surface treatment)
Significance and Use | ||||||||||
3.1 In this test method, susceptibility to localized corrosion of aluminum is indicated by a protection potential (3.2 The breakdown (Eb), and protection potentials (Eprot) determined by the cyclic GSCP method correlate with the constant potential corrosion test (immersion-glassware) result for aluminum (1, 6, 7). When the applied potential was more negative than the GSCP Eprot, no pit initiation was observed. When the applied potential was more positive than the GSCP 3.2.1 Severe crevice corrosion occurred when the separation of Eb and 3.3 DeBerry and Viebeck (3-5) found that the breakdown potentials (3.4 If this test method is followed using the specific alloy discussed it will provide (GSCP) measurements that will reproduce data developed at other times in other laboratories. 3.5 Eb obtained are based on the results from eight different laboratories that followed the standard procedure using aluminum alloy 3003-H14 (UNS A93003). Eb and Eprot are included with statistical analysis to indicate the acceptable range. |
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1. Scope | ||||||||||
1.1 This test method covers a procedure for conducting cyclic galvanostaircase polarization (GSCP) to determine relative susceptibility to localized corrosion (pitting and crevice corrosion) for aluminum alloy 3003-H14 (UNS A93003) 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 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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