| 摘要 |
PURPOSE:To form the flux solution uniformly coated without being repelled by the oil and fat sticked to the brazing base metal face by making a boric acid and borax as a base material and contg. an interfacial active agent. CONSTITUTION:The flux for a hard solder takes a boric acid and borax as the base material and contains 0.01-3.0wt.% interfacial active agent and is used by melting in a water or hot water. It is thus melted only in a water and hot water easily available and an uniform coating can be executed without any water repellent even for the base metal face sticked with oil and fat. |
