標準號：BS 3900-J12-1998
中文標準名稱：涂料試驗方法.涂粉試驗.第J12部分:涂粉親合性測定
英文標準名稱：Methods of test for paints - Testing of coating powders - Determination of compatibility of coating powders
標準類型：G50
發布日期：1998/9/15 12:00:00
實施日期：1998/9/15 12:00:00
中國標準分類號：G50
國際標準分類號：87.040
適用范圍：This part of ISO 8130 is one of a series of standards dealing with the sampling and testing of paints, varnishes and related products. It specifies a method for the determination of the tendency for the mixing of two different coating powders to result in the deterioration of the surface quality of the final coating. The results depend on the following characteristics of the coating powders: a) their chemical reactivity; b) their chemical composition; c) their melt properties. The onset of the deterioration in appearance, its nature and its extent will depend greatly on the ratio in which the powders are mixed. The test is useful in predicting the possibility of incompatibility arising from mixing different powders both during the manufacturing process and during the application of the coating powder. The nature of the deterioration in surface appearance may manifest itself in various ways, including: - change in gloss level; - the presence of pinholes, including micro-pinholes; - the appearance of orange peel; - the presence of craters; - the presence of bittiness (graininess); - the presence of colour contamination. NOTE - Deterioration in mechanical properties may also be experienced. However, this part of ISO 8130 is only concerned with changes in appearance.