1. what is powder coating ?
Powder coating is a type of coating that is applied as a free-flowing, dry powder. The main difference between a conventional liquid paint and a powder coating is that the powder coating does not require a solvent to keep the binder and filler parts in a liquid suspension form. The coating is typically applied electrostatically and is then cured under heat to allow it to flow and form a "skin". The powder may be a thermoplastic or a thermoset polymer. It is usually used to create a hard finish that is tougher than conventional paint. Powder coating is mainly used for coating of metals.
粉末喷涂是用喷粉设备（静电喷塑机）把粉末涂料喷涂到工件的表面，在静电作用下，粉末会均匀的吸附于工件表面，形成粉状的涂层，金属铝型材上经过200℃以上高温烧烤后粉状物固化成为一层约60微米厚坚固光亮的涂层。使产品表面平整光滑色泽均匀具极强的耐酸性、耐碱性、耐撞性、耐磨损能长期经受强烈紫外辐射和酸雨的侵蚀不出现涂层粉化、褪色、脱落等现象。粉末喷涂铝型材在正常条件下使用寿命达30年。其表面涂层在5-10年内保证不褪色、不变色、不龟裂。其耐候性及而腐蚀性均优于普通铝材颜色多样化。
2. what is anodizing?
Anodizing (also spelled anodising, particularly in the UK and Australia) is an electrolytic passivation process used to increase the thickness of the natural oxide layer on the surface of metal parts.
Aluminium alloys are anodized to increase corrosion resistance and to allow dyeing (coloring), improved lubrication, or improved adhesion. Anodizing produces a very regular and uniform coating. Some aluminium aircraft parts, architectural materials, and consumer products are anodized. Anodized aluminium can be found on smartphones, multi-tools, flashlights, cookware,cameras, sporting goods, window frames, in electrolytic capacitors, and on many other products both for corrosion resistance and the ability to retain dye. Although anodizing only has moderate wear resistance, the deeper pores can better retain a lubricating film than a smooth surface would.
阳极氧化是指在铝及铝合金表面镀一层致密氧化铝为了防止进一步氧化，其化学性质与氧化铝相同。但是与一般的氧化膜不同，阳极氧化铝可以用电解着色加以染色。可显著改善铝合金的耐蚀性能，提高铝合金的表面硬度和耐磨性,经过适当的着色处理后具有良好的装饰性能。
铝及其合金阳极氧化膜着色技术常用有：化学染色和电解着色。化学染色是利用氧化膜层的多孔性与化学活性吸附各种色素而使氧化膜着色。 电解着色是将阳极氧化后的铝及其合金在含有金属盐的水溶液中进行交流电解，在氧化膜多孔层的底部沉积金属、金属氧化物或金属化合物,由于电沉积物对光的散射作用而呈现各种色彩。
3. what is electrophoresis？
Electrophoresis is the motion of dispersed particles relative to a fluid under the influence of a spatially uniform electric field. The technique applies a negative charge so proteins move towards a positive charge. It is ultimately caused by the presence of a charged interface between the particle surface and the surrounding fluid.
把氧化铝材为阳极，置于水溶性的乳胶液中，通以直流电，人为地在铝材氧化膜的表面沉积成涂漆膜保护层从而形成电泳铝材。 高档电泳铝材主要特点：
1、具有很强的漆膜硬度、抗冲击力强。 2、具有很高的漆膜附着力，不易脱落老化。 3、比氧化铝材有更强的耐磨性、耐候性、耐碱性。 4、表面色彩丰富、靓丽，具有镜面般的光泽效果。
