安美特--电镀基础知识培训课件.ppt

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