ASTM C1617-24由美国材料与试验协会 US-ASTM 发布于 2024-06-05。
ASTM C1617-24在国际标准分类中归属于: 77.060 金属的腐蚀。
ASTM C1617-24 定量加速实验室评价热绝缘材料中浸出离子萃取溶液对碳钢水腐蚀的标准试验方法的最新版本是哪一版?
最新版本是 ASTM C1617-24 。
1.1 This test method covers procedures for a quantitative accelerated laboratory evaluation of the influence of extraction solutions containing ions leached from thermal insulation on the aqueous corrosion of carbon steel. The primary intent of the practice is for use with thermal insulation and associated materials that contribute to, or alternatively inhibit, the aqueous corrosion of carbon steel due to soluble ions that are leached by water from within the insulation. The quantitative evaluation criteria are Mass Loss Corrosion Rate (MLCR) expressed in mils per year determined from the weight loss due to corrosion of exposed metal coupons after they are cleaned. 1.2 This test method cannot cover all possible field conditions that contribute to aqueous corrosion. The intent is to provide an accelerated means to obtain a non-subjective numeric value for judging the potential contribution to the corrosion of carbon steel that can come from ions contained in thermal insulation materials or other experimental solutions. The calculated numeric value is the mass loss corrosion rate. This calculation is based on general corrosion spread equally over the test duration and the exposed area of the experimental cells created for the test. Corrosion found in field situations and this accelerated test also involves pitting, edge effects, and the rate changes over time. 1.3 The insulation extraction solutions prepared for use in the test can be altered by the addition of corrosive ions to the solutions to simulate contamination from an external source. Ions expected to provide corrosion inhibition can be added to investigate their inhibitory effect. 1.4 Prepared laboratory ionic solutions are used as reference solutions and controls, to provide a means of calibration and comparison.2 1.5 Other liquids can be tested for their potential corrosiveness including cooling tower water, boiler feed, and chemical stocks. Added chemical inhibitors or protective coatings applied to the metal can also be evaluated using the general guidelines of the practice. 1.6 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.7 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.8 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
通过模拟浸出 (迁移) 试验 (由低密度聚乙烯瓶、 聚丙烯瓶盖和胶塞等组成、萃取溶剂分别为 pH 2.5的缓冲溶液、pH 9.5 的缓冲溶液和体积比 1∶1 的异丙醇/ 水),揭示注射剂和滴眼剂包材的浸出物谱。包材的萃取物谱与包材的化学组成与结构密切相关,且受萃取介质和具体浸出物化学性质的影响;虽然药物与包材直接接触可能加速某些浸出物的迁移,但并不是发生迁移和浸出的先决条件。...
溶液冷却并静置过夜,用致密无灰定量滤纸过滤,并用热水洗至无氯离子为止(用硝酸银溶液检验无浑浊);7. 将带有沉淀的滤纸转移到已知质量的瓷坩埚中,低温灰化滤纸后,将陶瓷纤维马弗炉温度升至850℃灼烧40分钟,取出坩埚,在空气中稍微冷却移至干燥器中冷却至室温后称量。注:每配置一批艾氏剂或更换其他任何一种试剂时,应进行2个以上空白试验,硫酸钡沉淀的质量极差不得大于0.0010g,取平均值作为空白值。...
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