摘要:
A trivalent-chromium chemical conversion coating from which substantially no hexavalent chromium is released. The trivalent-chromium chemical conversion coating is one formed on the surface of a zinc or zinc-alloy deposit. In a brine spray test, the chemical conversion coating has unsusceptibility to corrosion (time required for white-rust formation) of 96 hours or longer. The chemical conversion coating has a hexavalent-chromium concentration less than 0.01 µg/cm 2 in terms of metal atom amount. The amount of hexavalent chromium released after 30-day standing in a thermo-hygrostatic chamber at a temperature of 80°C and a humidity of 95% (amount of hexavalent chromium released when the coating is immersed in 100°C water for 10 minutes) is smaller than 0.05 µg/cm 2 .
摘要:
A trivalent-chromium chemical conversion coating from which substantially no hexavalent chromium is released. The trivalent-chromium chemical conversion coating is one formed on the surface of a zinc or zinc-alloy deposit. In a brine spray test, the chemical conversion coating has unsusceptibility to corrosion (time required for white-rust formation) of 96 hours or longer. The chemical conversion coating has a hexavalent-chromium concentration less than 0.01 µg/cm 2 in terms of metal atom amount. The amount of hexavalent chromium released after 30-day standing in a thermo-hygrostatic chamber at a temperature of 80°C and a humidity of 95% (amount of hexavalent chromium released when the coating is immersed in 100°C water for 10 minutes) is smaller than 0.05 µg/cm 2 .
摘要:
A trivalent-chromium chemical conversion coating from which substantially no hexavalent chromium is released. The trivalent-chromium chemical conversion coating is one formed on the surface of a zinc or zinc-alloy deposit. In a brine spray test, the chemical conversion coating has unsusceptibility to corrosion (time required for white-rust formation) of 96 hours or longer. The chemical conversion coating has a hexavalent-chromium concentration less than 0.01 µg/cm 2 in terms of metal atom amount. The amount of hexavalent chromium released after 30-day standing in a thermo-hygrostatic chamber at a temperature of 80°C and a humidity of 95% (amount of hexavalent chromium released when the coating is immersed in 100°C water for 10 minutes) is smaller than 0.05 µg/cm 2 .
摘要翻译:基本上不释放六价铬的三价铬化学转化涂层。 三价铬化学转化涂层是在锌或锌合金沉积物的表面上形成的涂层。 在盐水喷雾试验中,化学转化涂层具有96小时或更长时间的不易腐蚀(白锈形成所需的时间)。 以金属原子量计,化学转化膜的六价铬浓度小于0.01μg/ cm 2。 在温度80℃,湿度95%的恒温恒湿槽中放置30天后释放的六价铬的量(当将涂层浸入100℃水中10分钟时释放的六价铬的量) 小于0.05μg/ cm 2。
摘要:
A trivalent-chromium chemical conversion coating from which substantially no hexavalent chromium is released. The trivalent-chromium chemical conversion coating is one formed on the surface of a zinc or zinc-alloy deposit. In a brine spray test, the chemical conversion coating has unsusceptibility to corrosion (time required for white-rust formation) of 96 hours or longer. The chemical conversion coating has a hexavalent-chromium concentration less than 0.01 µg/cm 2 in terms of metal atom amount. The amount of hexavalent chromium released after 30-day standing in a thermo-hygrostatic chamber at a temperature of 80°C and a humidity of 95% (amount of hexavalent chromium released when the coating is immersed in 100°C water for 10 minutes) is smaller than 0.05 µg/cm 2 .
摘要翻译:三价铬化学转化膜,基本上不释放六价铬。 三价铬化学转化涂层是在锌或锌合金沉积物的表面上形成的。 在盐水喷雾试验中,化学转化膜对96小时以上的腐蚀(白锈形成所需的时间)具有不可接受性。 化学转化膜的金属原子量的六价铬浓度小于0.01μg/ cm 2。 在温度为80℃,湿度为95%的恒温箱中放置30天后释放的六价铬的量(涂布在100℃水中浸渍10分钟时释放的六价铬的量) 小于0.05μg/ cm 2。