A Study on Aluminium Powder in Aluminium Paste

We investigated the microphotographical figure, rate of reflecting power of light and corrosion registance of aluminium powder contained in aluminium paste (made in England, Germany and Japan), and the following results were obtained.Small amount of massive particles were observed among the fine leaflike aluminium powder.The ratio of reflection of “Alpaste” (made in England) was of highest value. By the corrosion test measuring dissolving rate of powder in 5% hydrochloric acid solution, the powder made in Japan was excellent next came that of Germany and then that of England. However, the effect of organic solvent existed in the paste and size of aluminium powder were out of consideration.