Anodizing
Dying Anodized Parts With Small Holes
We send our 6061 aluminum bars to an outside anodizer for Type II anodize and black dye. These parts have several very small diameter, blind holes, both threaded and non-threaded. When we get these parts back from the anodizer, the tapped holes will have bleed-out areas of white streaks, and sometimes the holes are filled with a white powder.
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In a Vaccum: Sandvik's new preteatment process
Sandvik Surface Technology in Benton Harbor, MI says it has developed a new, environmentally friendly process for precoating metal strips that combines an advanced vaccum process with nanotechnology.
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Back in Black: Birchwood Casey's black oxide
Black anodize finishes have long been favored for their thick, hard coating properties. It is also these very same characteristics that often make the anodizing unusable for many military and aerospace applications.
Read MoreWhat is the Correct Anodizing Specification?
My company fabricates aluminum and steel pedestrian bridge railing among other bridge parts. We recently got an aluminum railing job that called for “Type I” anodizing per MIL-A-8625. There was no anodic coating thickness called out. We are not anodizers and we are at a loss as to how to write up a meaningful anodizing specification for this railing.
Read MoreTeflon Impregnation and Wear
Does Teflon-impregnated aluminum offer a higher resistance to wear or corrosion?
Read MoreThe Problem of Sealing Smut
Is there an anodizing cleanliness standard that is reasonable for our suppliers to meet? Is there an ISO, ASTM, IPC, Nadac or any other standard?
Read MoreDichromate Sealing and Fatigue Life
We are looking for some references that show that dichromate sealing restores the loss in fatigue life caused by hard anodizing aluminum alloys.
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