BS 3900-J6-1993 涂料试验方法.第J6部分:粉末涂层试验.用气体比对测重计测定粉末涂层密度(参照法)

标准号：BS 3900-J6-1993
中文标准名称：涂料试验方法.第J6部分:粉末涂层试验.用气体比对测重计测定粉末涂层密度(参照法)
英文标准名称：Methods of test for paints - Testing of coating powders - Determination of density of coating powders by gas comparison pyknometer (referee method)
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 method for the de-termination of the density of coating powders using a gas comparison pyknometer. It can be used for all types of coating powder, is simple to carry out, but requires more expensive instrumentation than is of-ten used for density determinations. The density of coating powders can also be deter-mined using the liquid displacement pyknometer method described in ISO 8130-3. The apparatus is relatively inexpensive, but the liquid displacement pyknometer method is liable to give erroneous re-sults, particularly if the powder swells in contact with the displacement liquid used or the displace-ment liquid does not totally displace the air between the powder particles. The liquid displacement method is much slower in execution, less accurate and is only to be used if it can be shown that the same results will be obtained as for the gas com-parison pyknometer method.