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g3141前沿信息_g3141高铁时刻表(2024年11月实时热点)

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g3141

盐雾测试常见标准盐雾试验：主要确定材料保护层和装饰层的有效性以及测定盐的沉积物对装备物理和电气性能。盐雾测试国家标准是：GB/T 2423.17，IEC60068-2-11,ISO4628-3, ASTM B117, JIS-Z2371, JIS-G3141, GJB 150.11A-2009, MIL-STD-810F, MIL-STD-883E等。盐雾试验通常测试实时间周期，干燥24小时，喷雾24小时，共进行2次循环，共计48小时的盐雾试验。盐雾试验是一种利用盐雾试验设备所创造的人工模拟盐雾环境条件来确认产品或金属材料耐腐蚀性能的环境试验。试验的严苛程度取决于曝露持续时间。实验室模拟盐雾可以分为三类：中性盐雾试验、醋酸盐雾试验、铜盐加速醋酸盐雾试验。 (1)中性盐雾试验（NSS试验）是出现比较早目前应用领域比较广的一种加速腐蚀试验方法。它采用5%的氯化钠盐水溶液，溶液PH值调在中性范围（6.5～7.2）作为喷雾用的溶液。试验温度均取35℃，要求盐雾的沉降率在1～2ml/80cm/h。 (2)醋酸盐雾试验（ASS试验）是在中性盐雾试验的基础上发展起来的。它是在5%氯化钠溶液中加入一些冰醋酸，使溶液的PH值降为3左右，溶液变成酸性，后面会形成的盐雾也由中性盐雾变成酸性。它的腐蚀速度要比NSS试验快3倍左右。 (3)铜盐加速醋酸盐雾试验（CASS试验）是国外新近发展起来的一种快速盐雾腐蚀试验，试验温度为50℃，盐溶液中加入少量铜盐-氯化铜，强烈诱发腐蚀。它的腐蚀速度大约是NSS试验的8倍

「饶车微视角」10月14日，上饶站客运员叶宏伟主动帮助乘坐G3141次列车的重点旅客提拿行李，并为其推轮椅，引导其乘车，得到旅客好评。（文图：杨佳煜）

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