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ASTM G97-1997(2007)
Standard Test Method for Laboratory Evaluation of Magnesium Sacrificial Anode Test Specimens for Underground Applications
适用范围:<p>This test is a guide for evaluating magnesium anodes. The degree of correlation between this test and service performance has not been fully determined.</p><p id="s00002">1.1 This test method covers a laboratory procedure that measures the two fundamental performance properties of magnesium sacrificial anode test specimens operating in a saturated calcium sulfate, saturated magnesium hydroxide environment. The two fundamental properties are electrode (oxidation potential) and ampere hours (Ah) obtained per unit mass of specimen consumed. Magnesium anodes installed underground are usually surrounded by a backfill material that typically consists of 75 % gypsum (CaSO<sub>4</sub><span class=''unicode''>x00B7;</span>2H<sub>2</sub>O), 20 % bentonite clay, and 5 % sodium sulfate (Na<sub>2</sub>SO<sub>4</sub>). The calcium sulfate, magnesium hydroxide test electrolyte simulates the long term environment around an anode installed in the gypsum-bentonite-sodium sulfate backfill.</p> <p id="s00003">1.2 This test method is intended to be used for quality assurance by anode manufacturers or anode users. However, long term field performance properties may not be identical to property measurements obtained using this laboratory test. </p> <p class="desc"> <span class="smallcap">Note</span> 18212;Refer to Terminology G 15<astmref rid="a00003"> for terms used in this test method.</p> <p id="s00004">1.3 <span class="italic">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. <span class="med">For specific precautions, See Section 7 and Paragraph 8.1.1.</span></span>
实施日期: 1997-10-10
中标分类号: H61 - 冶金 - 轻金属及其合金
ICS分类号: 77.150.20 - 冶金 - 锰产品
标准组织: ASTM - 美国材料与试验协会标准
全文来源: WF
英文关键词: coulometer electroplater's tape sacrificial anode Ampere hours Anodes Backfill--testing Corrosion Current measurement Electrodes Laboratory analysis/evaluation Magnesium Magnesium anodes Oxidation testing Performance--metals/alloys materials/applications Saturated calcium sulfate/magnesium hydroxide environments Underground environments
语种: 汉语
页数: 4
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