Rack plating - process description
Rack plating - process description
(OP)
Hello All. This is my first thread and please be lenient. I have a problem with rack plating. my supplier produce for my shells with tin cover - rack plating. In places when shells have contact with rack tin have value below tolerance and appear a black stains. Will great iif somebody will help me in this case - how improve this defect? I try to find also a description for rack palting method . Thanks for help. Regards





RE: Rack plating - process description
Contrast that with barrel plating, where parts are placed in a perforated plastic barrel that is continuously rotated as it carries the parts from tank to tank and within the tanks, so points of electrical contact move around as the parts tumble within the barrel, and the plating comes out uniform, or at least without contact scars. If the parts tangle with each other, this process may not be appropriate.
Mike Halloran
Pembroke Pines, FL, USA
RE: Rack plating - process description
Aerospace companies usually indicate on their blueprints acceptable spots for racking for anodizing or plating.
By a black stain, do you just mean a bare spot with no plating? Stains can also appear from inadequate rinsing -- sometimes the racking pins impede rinsing from holes, so trapped liquids may cause staining vertically downward from the hole. What is the substrate material? To what plating specification?
RE: Rack plating - process description
RE: Rack plating - process description
To show pictures, you must upload to some free service and get a URL ending .jpg. Then, to include in Eng-Tips, type [img URL ] (see below after clicking 'Preview Post.'
Also, to get many professional platers to review your problem, post a 'Hotline Letter' with all details at http://www.finishing.com/Letters/cgimail.html
I'm not sure how to post photos, give URL or email to the editor?
RE: Rack plating - process description