Using the Complete Spectrum Approach with One Universal Type I -II-III and 123 Mixed Electrolyte - Anodizing Difficult Alloys for Problem Solving Situations Dimensional Restoration - (PPT)

摘要

The Complete Spectrum Universal Type MI-III and 123 Mixed Electrolyte with the latest addition of Variable Pulse Technology will be presented. This represents a major improvement in the complete spectrum approach for producing consistently superior quality in production tank, salvage and selective brush anodizing. Discussions will include processing difficult alloys (2024, 2219, 7050, 7075, etc), dimensional restoration, pore structure conditioning for adhesion promotion, repair of scratches and masking leakage, and problem part configurations (long tubing i.d's, etc), all with one universal organic/sulfuric electrolyte. Anodizing at lower voltages and higher current densities will be stressed using new selective brush technology. Data logger graphs indicating dramatic energy and time savings for production tank and selective brush anodize, along with photographs of actual production parts, will be included. This paper presents the Complete Spectrum approach with one universal chromate free electrolyte as it is used in problem solving situations and particular applications where pore structure and adhesion promotion are critical factors. Quality anodizing is all about pore structure. Anodizing difficult alloys without burning can be dependent upon pore structure development early during the first few minutes of the ramp cycle. Remember what I have always been known to preach: "All of the good or the bad is Done During the first few minutes of the run'" Dimensional restoration with good quality heavy thickness coatings of 8-10 mils and higher is really dependent upon development of the first coating pore structure at the lowest possible voltage, early in the ramp cycle. Please study the graph below because we will refer to it later on in the paper. Please note where the anodizing current 120 amps is initiated at only 12 volts, all due to slow APCD (Anodic Pulse Capacitance Discharge). When the APCD is removed, the anodizing current drops to zero. The anodizing current at 12volts was not possible without APCD. This is truly a remarkable major key to the complete system. However, this is only possible to this greater extent due to the rectifier power supply wave form and mixed electrolyte which were explained in the 2011 and 2012 papers. The capacitance reactance (Impedance) at the anode (on the part) is discharged which allows more current to flow at the same voltage.