As is the case with carbon steel screws a plated stainless steel screw is less likely to corrode aluminum.
Black oxide vs stainless steel screws.
6 x 1 black oxide coated stainless flat head phillips wood screw 25 pc 18 8 304 stainless steel screws by bolt dropper 4 6 out of 5 stars 322 5 35 5.
However stainless steel is reactive with aluminum and when a stainless steel screw is in contact with an aluminum base metal the aluminum is likely to corrode.
Black oxide or blackening is a conversion coating for ferrous materials stainless steel copper and copper based alloys zinc powdered metals and silver solder.
Black oxide fasteners made from stainless steel usually grades 18 8 or 304 have been chemically treated to alter certain qualities of the material most notably the color.
A chemical discoloration which does not add to part thickness.
Prized both for the.
Black oxide stainless steel hardware screws and fasteners are always in stock.
Charcoal grey or black.
I d like to put stainless steel 18 8 screws with black oxide on the outside surface of a medical scanner device.
The main point of stainless steel is the surface is more corrosion resistant as the bare metal usually with passivation of course.
Black oxide screws are provide the benefits of plain stainless with the appearance of alloy steel with a beautiful black satin finish.
If you must then stainless can be painted or powder coated without too much trouble but processes like black oxide and electroplating typically require stainless to be activated using a very harsh acid mix.
Ferrous metals and stainless steel.
Screws treated with a high quality coating consisting of zinc and aluminum.
Black oxide stainless steel nuts bolts and washers are the most common form of black oxide fastener available.
Black oxide stainless steel screws are sold in quantities from the hundreds to the thousands.
Custom stainless black oxide screws and fasteners are available by contacting us.
Metric or standard we carry almost every size and head style all in a black oxide finish.
Customers can therefore conveniently buy enough black oxide nuts and bolts to support their businesses and processes.
The treatment also adds a mild corrosion and abrasion resistance in addition to the plain stainless steel s nature and reduces the now black oxide stainless steel.
Usually combined with an oil dip.
We ve been distributing black oxide fasteners and more since 1947 and we supply fasteners in bulk and in custom packaging and.
Rust resistance comes from the oil only.
The black oxide treatment is also referred to as gun bluing.
When fasteners are dipped into the black oxide bath materials warm and hot processes the harsh chemical components convert the top layer into magnetite.
In other words they ll be exposed frequently to cleaning agents and bodily fluids.
Zinc or manganese phosphate used with a rust inhibiting oil dip.
