Performance Evaluation of a Highly Efficient Environmental Protection Pre-film Agent
Due to environmental problems,the traditional phosphorous pre-film agent is limited.A phosphorus-free and efficient pre-film agent has been developed in this paper.It can be used for pre-film at room temperature,and the drop test of copper sulfate solution is much longer than the 10 s stipulated.Moreover,the pre-film wastewater did not contain phosphorus and can be directly transferred to normal production operation without discharge and replacement.
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