Zinc or manganese phosphate used with a rust inhibiting oil dip.
Black oxide vs stainless steel screws.
Usually combined with an oil dip.
Rust resistance comes from the oil only.
Custom stainless black oxide screws and fasteners are available by contacting us.
A chemical discoloration which does not add to part thickness.
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 stainless steel nuts bolts and washers are the most common form of black oxide fastener available.
The main point of stainless steel is the surface is more corrosion resistant as the bare metal usually with passivation of course.
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.
Black oxide stainless steel hardware screws and fasteners are always in stock.
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.
When fasteners are dipped into the black oxide bath materials warm and hot processes the harsh chemical components convert the top layer into magnetite.
Black oxide screws are provide the benefits of plain stainless with the appearance of alloy steel with a beautiful black satin finish.
One of its advantages over other coatings is.
Screws treated with a high quality coating consisting of zinc and aluminum.
As is the case with carbon steel screws a plated stainless steel screw is less likely to corrode aluminum.
Customers can therefore conveniently buy enough black oxide nuts and bolts to support their businesses and processes.
The black oxide treatment is also referred to as gun bluing.
Charcoal grey or black.
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.
Ferrous metals and stainless steel.
In other words they ll be exposed frequently to cleaning agents and bodily fluids.
Black oxide stainless steel screws are sold in quantities from the hundreds to the thousands.
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.
We ve been distributing black oxide fasteners and more since 1947 and we supply fasteners in bulk and in custom packaging and.
Metric or standard we carry almost every size and head style all in a black oxide finish.
Prized both for the.
It is used to add mild corrosion resistance for appearance and to minimize light reflection.
