公开(公告)号：US4158710A

公开(公告)日：1979-06-19

申请号：US865780

申请日：1977-12-29

申请人： Adam Gierek ,  Lech Bajka ,  Danuta Adamczyk

发明人： Adam Gierek ,  Lech Bajka ,  Danuta Adamczyk

IPC分类号： C23C2/12 ,  C23C1/08 ,  C23C1/12

CPC分类号： C23C2/12

摘要： The work-pieces are mechanically cleaned, degreased and washed, and then etched in an aqueous solution containing 0.5-1.0% by weight of citric acid, and 16-24% by weight of hydrochloric acid, having a temperature of 15.degree.-30.degree. C., preferably of 20.degree.-25.degree. C., for the time of 1-20 minutes, preferably 2-5 minutes, whereafter the work-pieces are neutralized in an aqueous ammonia solution having a concentration not exceeding 1% by weight, at a temperature of 15.degree.-25.degree. C., in a time not shorter than 1 minute. After being washed in water at a temperature not exceeding 35.degree. C. in a time not shorter than 1 minute, they are dipped in an agitated aqueous solution of the flux, containing 1.8-2.5% by weight of potassium fluoride, 0.8-1.5% by weight of sodium fluoride, and 1.5-3.0% by weight of potassium fluorozirconate, having a temperature of 40.degree.-80.degree. C. After at least two minutes of holding in the flux, the work-pieces are dried and finally dipped in a melt of aluminum or alloys thereof. Alternatively a flux having composition 1.5-2.0% by weight of potassium fluoride, 1.5-2.0% by weight of sodium fluoride, 6.0-10.0% by weight of sodium tetraborate and 2.5-5.0% by weight of acetic acid, having a temperature of 15.degree.-40.degree. C. may be used, for a period not shorter than 2 minutes.

摘要翻译： 将工件机械地清洗，脱脂和洗涤，然后在含有0.5-1.0重量％柠檬酸和16-24重量％盐酸的水溶液中蚀刻，温度为15-30℃ 优选20°-25℃，时间为1-20分钟，优选2-5分钟，然后将工件在浓度不超过1重量％的氨水溶液中中和， 在15°-25℃的温度下，在不短于1分钟的时间内。 在不超过35℃的温度下在不短于1分钟的时间内在水中洗涤后，将其浸入搅拌的助熔剂水溶液中，该溶液含有1.8-2.5重量％的氟化钾，0.8-1.5重量％ 的氟化钠和1.5-3.0重量％的氟锆酸钾，温度为40-80℃。在焊剂中保持至少两分钟后，将工件干燥并最终浸入 铝的熔化或其合金。 或者，具有组成为氟化钾1.5-2.0重量％，氟化钠1.5-2.0重量％，四硼酸钠6.0-10.0重量％和乙酸2.5-5.0重量％的助熔剂，温度为15 可以使用-40℃-40℃，时间不短于2分钟。