设为首页|加入收藏

• 首 页
• 美军标 MIL
• 国际标准
• 协会标准
• 国内标准
• 论 坛

IEC 61158-5-3-2010 工业通信网络.现场总线规范.第5-3部分:应用层设备定义.3型元件

上一篇: IEC 61158-5-22-2010 工业通信网络.现场总线规范.第5-22部分:数据链路层协议规范.22型元件
下一篇: IEC 61300-2-9-2010 纤维光学互连器件和无源元件.基本试验和测量规程.第2-9部分:试验.冲击试验

Product Code:SAE AIR4275
Title:Jet Reference Fluid Study for Fuel Tank Sealants
Issuing Committee:Ams G9 Aerospace Sealing Committee
Scope:Standard reference fluids, or test fluids, have long been used to evaluate the effects of hydrocarbon fuels on various materials, such as integral fuel tank sealants. Standard fluids are required because hydrocarbon fuels, such as JP-4, vary widely in composition depending on crude source, refining techniques, and other factors. To ensure reliable and reproducible results when determining the fuel resistance of materials, reference fluids of known composition, using worst case fuel compositions, are used. The current Jet Reference Fluid (JRF) called out in military sealant specifications was developed in the mid-1950s specifically as a JP-4 type test fluid formulation to be used for the accelerated laboratory testing of integral fuel tank sealants. In August 1978, chalking of the polysulfide sealant in integral fuel tanks of some new aircraft at Edwards Air Force Base in California was discovered after only 1 year of service. Although chalking of polysulfide sealants had been observed occasionally in the past, the rate of chalking was unprecedented. The results of an investigation showed that the rapid chalking of the polysulfide sealant was caused by a chemical reaction involving metal ions (copper, cadmium, lead, and iron) and mercaptan sulfur in the fuel. It was also noted that qualification testing of the sealant used had not predicted the chalking that occurred in service. Further investigation disclosed that the sealant had passed the chalking test in the military specification because the JRF used in the specifications chalking test did not contain trace metal ions as did the fuel removed from the tanks of the affected aircraft. The special Air Force investigating team included in its final report a recommendation that the JRF specification be reviewed and revised. The above chalking incident coupled with concerns resulting from deficiencies observed with the current JRF, and from changing sources of JP-4 indicated that an update of the JRF formulation in the sealant specifications was needed. A proposal was made to the SAE Aerospace Sealing Committee (G-9) which then formed a subcommittee for the development of a new Jet Reference Fluid (JRF) for evaluation of integral fuel tank sealants.

标准名称：	树脂整理剂 加催化剂后溶液稳定性的测定
英文名称：	Resin finishing agent—Determination of the stability of solution after adding catalyst
中标分类：	化工 >> 涂料、颜料、染料 >> 染料基础标准与通用方法
ICS分类：
替代情况：	替代GB/T 5548-1985
发布部门：	中华人民共和国国家质量监督检验检疫总局 中国国家标准化管理委员会
发布日期：	1985-10-29
实施日期：	2008-06-01
首发日期：	1985-10-29
作废日期：
主管部门：	中国石油和化学工业协会
提出单位：	中国石油和化学工业协会
归口单位：	全国染料标准化技术委员会(SAC/TC 134)
起草单位：	沈阳化工研究院
起草人：	姬兰琴、沈日炯
出版社：	中国标准出版社
出版日期：	2008-06-01
页数：	8页
计划单号：	20061561-T-606

本标准规定了树脂整理剂加催化剂后溶液稳定性的测定方法，适用于树脂整理剂加催化剂后溶液稳定性的测定。

没有内容

没有内容

下列文件中的条款通过本标准的引用而成为本标准的条款。凡是注日期的引用文件,其随后所有的修改单(不包括勘误的内容)或修订版均不适用于本标准,然而,鼓励根据本标准达成协议的各方研究是否可使用这些文件的最新版本。凡是不注日期的引用文件,其最新版本适用于本标准。
GB/T659 化学试剂 硝酸铵
GB/T672 化学试剂 六水合氯化镁(氯化镁)
GB/T676 化学试剂 乙酸(冰醋酸)
GB/T1396 化学试剂 硫酸铵
GB/T6682 分析实验室用水规格和试验方法(GB/T6682-1992,neqISO3696:1987)

© 2009-2024 标准资料网 版权所有，并保留所有权利。

北京智聚科技有限公司 Tel: 010-67123753 E-mail: kefu@infoeach.com

京ICP备14017250号-1