镁合金脱脂剂

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<strong><span>1.镁合金脱脂剂工艺特点：</span></strong>
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<span>² </span><span>去除工件表面的氧化膜、油膜及杂质，形成一层均匀干净的镁合金表面，有</span><span>利于后续工艺良好结合力的形成。</span>
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<span>² </span><span>不腐蚀镁合金基体。</span>
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<span>² </span><span>适用于镁合金的喷涂或者电镀的前处理。</span>
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<strong><span>2.镁合金脱脂剂镀液组成及操作条件：</span></strong>
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<span>原料及操作</span>
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<span>标准开缸量</span>
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<span>范围</span>
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<span>脱脂剂281A</span>
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<span>100毫升</span><span>/</span><span>升</span>
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<span>8</span><span>0-</span><span>200毫升</span><span>/</span><span>升</span>
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<span>脱脂剂281B</span>
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<span>5毫升</span><span>/</span><span>升</span>
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<span>2-5毫升</span><span>/</span><span>升</span>
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<span>pH</span>
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<span>12.5</span>
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<span>12.1-12.8</span>
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<span>温度</span>
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<span>6</span><span>0℃</span>
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<span>室温-70</span><span>℃</span>
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<span>时间</span>
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<span>6分钟</span>
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<span>5</span><span>-1</span><span>0分钟</span>
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<strong><span>3.镁合金脱脂剂镀液配制方法：</span></strong>
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<span>开缸时，在槽中加入所配溶液</span><span>2/3</span><span>的水。</span>
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<span>加入所需份量的镁合金</span><span>脱脂剂</span><span>，搅拌溶解。</span>
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<span>加入纯水至所需体积。</span>
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<strong><span>4.镁合金脱脂剂设备需求</span></strong>
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<span>² </span><span><span>项目</span>               <span>要求</span></span>
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<span>² </span><span><span>槽体</span>               PP、PVC或高密度PE。</span>
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<span>² </span><span><span>挂具</span>               PP、PVC或316型不锈钢。确保工件在槽液中垂直，相邻两块板间隔最小是10mm。</span>
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<span>² </span><span><span>空气搅拌</span>           <span>主副槽要有适度、均匀的打气搅拌。</span></span>
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<span>² </span><span><span>循环</span>               <span>每小时</span>3-4个循环。</span>
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<span>² </span><span><span>添加系统</span>           <span>需要，加料泵材质为</span>PVC、PP或PE，可耐强碱。</span>
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<span>² </span><span><span>过滤系统</span>           <span>连续循环过滤，用</span>10μm过滤棉芯或过滤袋。</span>
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<span>² </span><span><span>抽风</span>               <span>需要。</span></span>
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<span>² </span><span><span>加热系统</span>           <span>需要。</span></span>
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<strong><span>4.镁合金脱脂剂注意事项：</span></strong>
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<span><span>当被处理工件过重油污时</span>,应适当考虑增加镁合金</span><span>脱脂剂</span><span>的用量</span>
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<span><span>当槽液使用一段时间后</span>,随着槽液中的油污量及污物量的增加会影响槽液的使用效果,通常处理面积在20-25m</span>^{<span>2</span>}<span>/L/内，这时应适当增加用料量,当加料后对工件除油脱脂仍达不到要求的处理效果时,应进行倒槽或换槽处理。</span>
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