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We are yellow chromating aluminum alloy 360 die castings. After processing, a grey/black material appears on rags used to wipe the parts. What is this material, and can it be prevented?
Ask an Expert Published: 8/1/2008
Removal Of Cured Powder
Can you recommend a blast cabinet and the best abrasive to use?
Ask an Expert Published: 12/1/2007
Cause of Warping
We removed several belt guards and put them in our wheel blaster—a rotating table blaster. It removed the paint to perfection, but warped the parts so extensively that we had to hammer them back into shape.
Ask an Expert Published: 10/1/2007
Measuring Liner Thickness
Is there a non-destructive way to measure liner thickness in our centrifugal disc finisher?
Ask an Expert Published: 10/1/2007
Cleaning Pre-Shot Peen
I am wondering what is commonly done to clean newly machined aluminum parts prior to shot peening?
Ask an Expert Published: 12/1/2006
Evaluating Acid Concentration by Titration
When performing a titration to evaluate the acid concentration we get a coalescing of black material in the solution as the end point is approached. Does anyone have an idea what this substance may be? Any suggestions?
Ask an Expert Published: 12/1/2006
Response to Spray Wand Phosphatizing
I read in the June 2006 addition of the Parts Cleaning Clinic your answers to the Phosphate Cleaning Systems question, where someone was using a spray wand phosphatizer at a pH of 2.0 and wanted to increase their quality (www.pfonline.com/articles/c...
Ask an Expert Published: 10/1/2006
Like New...Only Better?
I have some concern about using this media. Will it debur as well as my angle cut triangles? Will it have shorter life since it is smaller? Can I mix these two media? Should I have any other concerns?
Ask an Expert Published: 1/1/2006
New Vibratory Finishing Compound Wearing Down Too Fast
What component of the compound causes this accelerated media wear and could it also harm machine parts such as the urethane liner?
Ask an Expert Published: 1/1/2006

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