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Surface Pretreatment & Electrodeposition Coating (PT/ED)
This short course covers basic corrosion chemistry and the need and use of metal surface pretreatment. The effects of pretreatment system chemistry on corrosion and adhesion are presented in addition to surface cleaning chemistry. The importance of proper surface specification, several specification providers’ examples of surface specifications are presented. Detailed chemical processes for cleaning, phosphating, and chromating of metal surfaces are shown prior to beginning electrodeposition chemistry. Electrodeposition chemistry is presented as a subset of corrosion electrochemistry, showing how electric fields and current are used to apply an ED coating onto metal substrates as part of an automated production assembly. Cationic and anionic ED systems: their similarities and differences, benefits and disadvantages of each system are presented. The use of real-time electrical potential and current feedback data obtained during a deposition process is shown as a means to diagnose the ED process and equipment function. Common ED issues and coating defects that occur and how these may be identified and either prevented or repaired are discussed.
Course PDF downloads are available via the "Downloads" tab
Learners who successfully complete this course will receive a certificate of completion for 8.0 professional development hours.
Dr. Thomas Schuman
is an associate professor of chemistry at Missouri University of Science and Technology. He received his Ph.D. in Materials Science from the University of Alabama in Huntsville, in 1992, with research in polymer surface chemistry. Current research interests include composite syntheses using renewable industrial materials, environmentally benign recycling of polymer and electronics materials, synthesis of nanoparticle whiskers as fillers/reinforcing agents, and surface modification of the nanofillers to strengthen polymer-particle interfaces to improve tensile, flexural and impact strengths, impact absorption, fire retardance and dielectric breakdown and energy density improvement of composite dielectric (capacitor) films. He has over 35 publications and one patent.
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