-
ASTM F1137/F1137M-2018 紧固件磷酸盐/油防蚀镀层规格 Standard Specification for Phosphate/Oil Corrosion Protective Coatings for Fasteners
1.1 This specification covers the basic requirements for six grades of corrosion protection for fasteners. Grade A consists of a heavy zinc phosphate coating with no additional sealer (dry), Grade B consists of a heavy zinc phosphate coating with a dry organic sealer, Grade C consists of a heavy zinc phosphate coating with supplemental dry-to-touch oil type compound, Grade D consists of a heavy zinc phosphate coating with supplemental protective oil type compound, Grade E consists of a grain-refined microcrystalline zinc phosphate with supplemental oil type compound, and Grade F consists of a manganese phosphate coating with supplemental oil type compound. 1.2 This specification is intended primarily for fasteners such as nuts, clips, washers, and other ferrous threaded and non-threaded fasteners that require corrosion protection and lubrication. 1.3 These coatings may or may not have a decorative finish. 1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.5 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....
2023-09-20 17:00:01浏览：24
查看 -
GB 5009.256-2016 食品安全国家标准 食品中多种磷酸盐的测定
本标准规定了食品中多种磷酸盐的测定方法。<br />本标准适用于食品中磷酸盐、焦磷酸盐、六偏磷酸盐、三偏磷酸盐、三聚磷酸盐的测定。...
2023-07-02 02:00:02浏览：38
查看 -
-
-
聚丙烯成核剂研究的进展
综述了结晶对聚丙烯性能的影响、成核剂的种类及其在聚丙烯结晶过程中的作用.成核剂使聚丙烯结晶细微化、结晶度增加,聚丙烯的热变形温度、透明度、冲击强度等性能提高,成型性得到改善....
2020-10-26 22:14:25浏览：63
查看 -
聚丙烯结晶性能的研究
研究了成核剂对聚丙烯结晶性能的影响。采用羧酸盐类成核剂、磷酸盐类成核剂、松香型成核剂和山梨醇类成核剂考察了对均聚聚丙烯结晶行为产生的影响。选取磷酸盐类成核剂制备了耐热聚丙烯，并对其各项性能进行了测试分析。...
2020-10-26 22:14:25浏览：65
查看 -
-
-
