BS 3900-J7-1993 涂料试验方法.第J7部分:粉末涂层试验.用液体位移比重计测定粉末涂层密度

标准号：BS 3900-J7-1993
中文标准名称：涂料试验方法.第J7部分:粉末涂层试验.用液体位移比重计测定粉末涂层密度
英文标准名称：Methods of test for paints - Testing of coating powders - Determination of density of coating powders by liquid displacement pyknometer
标准类型：G50
发布日期：1993/4/15 12:00:00
实施日期：1993/4/15 12:00:00
中国标准分类号：G50
国际标准分类号：87.040
适用范围：This part of ISO 8130 specifies a liquid displacement pyknometer method for the determination of the density of coating powders. The method is based on a determination of the mass and the volume of a test portion. The apparatus specified is relatively inexpensive, but the liquid displacement pyknometer method is liable to give erroneous results, particularly if the powder swells in contact with the displacement liq-uid used or the displacement liquid does not totally displace the air between the powder particles. The liquid displacement method is much slower in exe-cution and less accurate than the gas comparison pyknometer method specified in ISO 8130-2 and is only to be used if it can be shown that the same re-sults will be obtained as for the gas comparison pyknometer method.