Atotech (China) Chemicals Ltd.SH安美特上海青浦分公司  PRESENTS   ELECTROPLATING  TRAINING 电镀培训   OUTLINE内容提要 INTRODUCTION 	介绍 ELECTROCHEMISTRY 	电化学 CLEANING & PREPLATE  	清洗及预镀 NICKEL 镍 Copper   铜  DECORATIVE CHROMIUM 	装饰铬 TESTING 	测试 FILTRATION  	过滤 TROUBLE SHOOTING 	故障处理 WHAT  IS  ELECTROPLATING  ?什么是电镀？ THE DEPOSITION OF A METALLIC COATING UPON A NEGATIVELY CHARGED CATHODE BY THE PASSING OF AN ELECTRIC CURRENT 	在电流通过时，有金属层沉积在带负电荷的阴极表面. WHAT  IS  THE  PURPOSE  ?电镀的目的是什么？ TO OBTAIN A METALLIC COATING HAVING CERTAIN PROPERTIES SUCH AS HARDNESS, BRIGHTNESS, CORROSION RESISTANCE AND TO REPRODUCE IDENTICAL FORMS IN ELECTROFORMING. 是为了得到具有某种特性的金属层，如：硬度、光亮度、耐腐性及在电铸方面复制同样的形状. REQUIREMENTS要求 SOURCE OF DIRECT CURRENT 	直流电源 A PLATING TANK 	电镀槽 A SOLUTION CONTAINING THE DISSOLVED SALTS OF THE METAL TO BE PLATED 	含有待镀的可溶性金属盐的溶液 ANODE	  ( POSITIVE  ELECTRODE ) 	阳极（正电极） A PREPARED  OBJECT -  	CATHODE          ( NEGATIVE ELECTRODE )     	准备好的待镀工件--阴极（负电极）                                                    WHAT  IS  DIRECT  CURRENT  ? 何为直流电？ THE FLOW OF ELECTRONS IN THE SAME DIRECTION BETWEEN POSITIVE AND  NEGATIVE  ELECTRODES 	在正负电极之间电子向同样的方向移动. WHAT  IS  A  PLATING SOLUTION  ?电镀液是什么？ A CONDUCTING MEDIUM FOR THE MOVEMENT OF METAL IONS  IN SOLUTION BETWEEN AN ANODE AND A CATHODE 	溶液中在阳极与阴极间金属离子移动的导电介质. WHAT  IS  pH  ?什么是pH值？ THE MEASUREMENT OF ACIDITY OR ALKALINITY 	用来度量酸碱度的 ON A SCALE FROM  0 TO 14 	pH值的范围处于0-14之间  0 TO 6.9 BEING ACIDIC AND  7.1 TO 14  ALKALINE  AND 7.0 BEING NEUTRAL.  	小于7的为酸性，大于7且小于等于14的为碱性，7.0为中性 HOW  ARE  PLATING SOLUTION  MAINTAINED  ?如何维护电镀液？ CHEMICAL ANALYSIS OF THE CONSTITUENTS 							持续的化学分析 HULL CELL PLATING TESTS		赫氏槽电镀测试 ADDITION OF CHEMICALS		添加化学品 ELIMINATION OF CONTAMINANTS	去除污染物 PERIODIC PURIFICATION		定期净化 REGULAR INSPECTION OF PARTS FOR DEFECTS 							缺陷/次品的常规检查 PHYSICAL TESTING			物理测试 WHAT  IS  A  METAL  ION  ?什么是金属离子？ A METAL ION IS AN ATOM OF A METAL HAVING A POSITIVE  ELECTRICAL CHARGE 	金属离子是带正电荷的金属原子(失去电子)  WHAT  ARE  THE  SOURCES OF  METAL   IONS  ?金属离子来自何处？ METAL SALTS  IN PLATING SOLUTION 	电镀液中的金属盐 SOLUBLE METAL ANODES 	可溶性的金属阳极 WHAT  ARE  ANODE  BAGS  ?什么是阳极袋？ ANODE BAGS ARE POROUS MEMBRANES PLACED AROUND ANODES TO COLLECT SLUDGE FORMING ON THE DISSOLVING ANODE 	阳极袋是包扎在阳极外面,会将电镀过程中产生的阳极泥收集在袋内的多孔的袋。 Basic ELECTROCHEMISTRY基本的电化学理论 ELECTROCHEMISTRY 电化学Plating  Cell 电镀槽 CATHODE  REACTIONS 阴极反应Cathode 阴极 Reduction of ions离子还原反应 Draw electrons from the external circuit从外部电路中吸收电子 TYPICAL REACTION 典型的反应 ANODE   REACTIONS 阳极反应Anode 阳极 Oxidation of metal to ions 金属氧化成阳离子 Release of electrons to external circuit 将电子释放至外部电路 TYPICAL REACTION 典型的反应 RATE  OF  CURRENT  FLOW 电流速率 FARADAY’S  LAW 法拉第定律 FARADAY’S  LAW 法拉第定律 FARADAY’S  LAW 法拉第定律 CALCULATING  THICKNESS FROM  WEIGHT从重量计算厚度 Thickness =       WT       1um=10 -4 cm CURRENT  IN  CELL电镀槽中的电流 Anode阳极-e  =  cathode阴极 +e DEPOSITION  WITH  H 2 LIBERATION伴随着氢气释放的沉积               NET RESULT	 最终的结果		 Cathode Efficiency Reduced	阴极电流效率的降低 pH Increased   pH值升高 PLATING  EFFICIENCY  AND TIME  OF  PLATING电镀效率和电镀时间 % Efficiency效率 = Actual Ni Plated实际镀
安美特电镀基础知识培训.ppt