Hebei Qinghe Dezheng Auto Parts Co., Ltd. : Test Standard for Automotive Rubber Hues (5)
Description:9. Cleanliness and extraction test: the fuel hose is usually injected with liquid C into the hose, a....
9. Cleanliness and extraction test: the fuel hose is usually injected with liquid C into the hose, and then emptied after 24h parking, and the inner wall is cleaned with liquid C. Collect the injected and rinsed C liquid, filter out the insoluble impurities, dry and weigh the weight of the insoluble impurities, the cleanliness is indicated by the number of impurities on the unit surface area of the hose or the maximum size of the impurities; The filtered solution is evaporated, dried and weighed to get the weight of the soluble substance. Then methanol was used to extract the wax from the evaporative drying of the filtrate, and the obtained methanol extract was evaporated and dried to weigh the wax.
10. Salt spray test: put the hose assembly in the salt spray formed by 5% sodium chloride solution at 35℃ for 24h, and check whether the metal of the pipe joint is corroded.
This article is organized by Hebei Qinghe Dezheng Auto Parts Co., Ltd
