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发明公开
CN106756958A 一种环保发黑液及其制备方法 无效 - 驳回

一种环保发黑液及其制备方法
摘要：
一种环保发黑液，以重量份数计，由以下原料制成：硫酸铜15‑25份，偏锡酸30‑50份，醋酸亚锡2‑5份，硫代硫酸钠5‑15份，二硫化锡15‑25份，锡酸钠15‑25份，硫酸镍5‑15份，柠檬酸钾5‑15份，水300‑400份。该环保发黑液，发黑处理后，不需要浸泡脱水防锈油，可在自然环境保存6个月不锈蚀。
摘要（英）：

The invention discloses an environment-friendly blackening solution. The environment-friendly blackening solution is prepared from, by weight, 15-25 parts of copper sulfate, 30-50 parts of metastannic acid, 2-5 parts of stannous acetate, 5-15 parts of sodium thiosulfate, 15-25 parts of stannic sulfide, 15-25 parts of sodium stannate, 5-15 parts of nickel sulfate, 5-15 parts of potassium citrate and 300-400 parts of water. According to the environment-friendly blackening solution, after blackening treatment is conducted, a metal layer does not need to be soaked with dewatering rust preventive oil, and the metal layer can be preserved for six months in a natural environment without being rusted.

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