6. As pretreatment primer for bare metal surface, aluminum alloy, copper brass, galvanized steel, such as ship, bridge, oil tank, appliance and so on to improve adhesion of the antirust coating to metal.
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AS-CMP pretreatment 亚钠磺化预处理
Using flocculation as pretreatment can cut down membrane pollution and increase permeation flux.
同时，絮凝处理能减轻膜污染，增大膜的渗透通量。
Influences of factors such as pretreatment, chemical conversion film on the quality of coating are analyzed.
分析了前处理、化学转化膜等因素对涂膜质量的影响。
The factors affecting the quality of this red iron oxide, such as pretreatment and reaction conditions, were also discussed.
讨论了预处理、反应条件等因素对氧化铁红质量的影响。
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