建筑设备和工业装置用隔热产品.水溶性氯化物、氟化物、硅酸盐、钠离子和pH值的微量测定

[中文适用范围]： 本文件规定了测定产品水提取物中痕量水溶性氯离子、氟离子、硅酸根和钠离子的设备和程序。 它还描述了测定水提取物 pH 值的程序。 适用于保温制品。 注：这些参数的确定可能与用于不锈钢奥氏体钢表面的隔热产品相关。 在某些条件下，氯离子、氟离子、硅酸盐和钠离子的存在会影响应力腐蚀开裂的风险。 有关本文件一般用途的更多信息，请参阅附件 B。 [外文原描述]： This document specifies the equipment and procedures for determining trace quantities of the water-soluble chloride, fluoride, silicate and sodium ions in an aqueous extract of the product. It also describes a procedure for the determination of the pH of the aqueous extract. It is applicable to thermal insulating products. NOTE The determination of these parameters can be relevant for thermal insulating products intended for application to stainless austenitic steel surfaces. The presence of chloride, fluoride, silicate and sodium ions under certain conditions can influence the risk of stress corrosion cracking. See Annex B for further information on general use of this document.