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    • 2. 发明授权
    • Corrosion resistant, chromate-free conversion coating for magnesium alloys
    • 耐腐蚀,无铬酸盐的镁合金转化涂层
    • US06887320B2
    • 2005-05-03
    • US10073688
    • 2002-02-11
    • Owen M. BrilesMark JaworowskiMichael A. Kryzman
    • Owen M. BrilesMark JaworowskiMichael A. Kryzman
    • C23C22/36C23C22/44C23C22/68C23C22/07
    • C23C22/78C23C22/36C23C22/44
    • The present invention relates to a process for forming a chromate-free, corrosion resistant coating on a product formed from magnesium or a magnesium alloy and to a solution used for forming the coating. The solution has phosphate and fluoride ions and contains from 1.0 g/l to 5.0 g/l of an active corrosion inhibitor selected from the group consisting potassium permanganate, sodium tungstate, sodium vanadate, and mixtures thereof. The solution may also containing from 0.1 to 1.0 vol % of a surfactant which reduces reaction time. The solution is maintained at a temperature of 120 to 200 degrees Fahrenheit and has a pH of 5 to 7. The process for forming the coating broadly comprises degreasing the magnesium or magnesium alloy product in a degreasing solution, cleaning the product in a highly alkaline cleaning solution, deoxidizing the product in a deoxidizing solution, and immersing the product in the coating solution for a time period of 15 minutes to 90 minutes.
    • 本发明涉及在由镁或镁合金形成的产品和用于形成涂层的溶液中形成无铬酸盐的耐腐蚀涂层的方法。 该溶液具有磷酸盐和氟离子,并且含有1.0g / l至5.0g / l的活性腐蚀抑制剂,其选自高锰酸钾,钨酸钠,钒酸钠及其混合物。 该溶液还可以含有0.1至1.0体积%的表面活性剂,其减少反应时间。 该溶液保持在120至200华氏度的温度,并且具有5至7的pH。形成涂层的方法广泛地包括在脱脂溶液中脱镁或镁合金产品,在高碱性清洗中清洗产品 溶液,在脱氧溶液中使产物脱氧,并将产物浸渍在涂布溶液中15分钟至90分钟的时间。