"I was very impressed with the attention to detail and professionalism that I recieved from Anco Precision. They will always be my first choice for all my machining needs!" John Golden - CA "Could not be more pleased with the quick turnaround and quality from your machine shop. Thank you Anco Precision." Bob Peterson - FL
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Here at Anco Precision machining we pride ourselves on being able to perform a variety of specialized tasks. Our CNC milling operations are state-of-the-art. We offer many of the machining industry’s leading operations at some of the best prices available. We also specialize in black oxide services. When dealing with different metals it is imperative that the correct form of corrosion resistance is met. Different types of materials i.e. different metals require various forms of corrosion resistance depending on the grade of material used and the jobs that it will be used for.
Our black oxide services, commonly referred to as ‘blackening’ in the industry is a conversion coating that involves ferrous materials such as copper/copper based alloys, powdered metals, zinc and solder (common in welding practices). Blackening serves as a mild form of corrosion resistance where maintaining appearance is also key. It is literally used to turn the various metals ‘black’. Anco’s black oxide services use special techniques of mixing the oxide with oils or wax to help reach the maximum corrosion resistance possible for the given materials. If material tolerances and thicknesses are key to your job then our black oxide services are perfect!
The process keeps coating buildup to a minimum so it won’t affect the dimensions of the part/job. The hot black oxide action involves a few different processes. First, a solution consisting of sodium hydroxide and other chemicals is heated to 285 degrees Fahrenheit which helps change the service of the material. Water is constantly added to the solution as to keep steam buildup to a minimum. The part/parts are then dipped in different tanks containing different solutions by automated machinery. The tanks contain an alkaline cleaner, followed by water, caustic soda (which is where the ‘black’ coloring comes from) and finally a sealant such as oil. The caustic soda is chemically bound to the surface of the metal which creates a porous top layer. When the coated part is heated it allows for the oil/sealant to sink into the porous layer thus sealing it.
The whole process of dipping, heating and sealing is what our black oxide services entail. This type of corrosion resistance is ideal for large batches of smaller pieces. Also, the ‘black’ layer is only a micrometer thick so there is zero dimensional impact. It also happens to be more cost effective than other methods of corrosion resistance like painting and electroplating. Contact Anco today to find out more about the black oxide services we can provide for you!