Birchwood Tru Temp XT Coats Difficult-to-Blacken Metals
Process forms durable black oxide finish on steel, iron and most stainless steel alloys.
Birchwood Technologies’ Tru Temp XT process is designed to form a durable black oxide finish on difficult-to-blacken steel, iron and most stainless steel alloys. It is a mid-temperature process that forms a satin black magnetite finish that protects surfaces in storage, shipment and startup, while resisting galling and aiding break-in.
Operating at 230-260°F, Tru Temp XT is used as a two-stage chemical reaction, first using Oxyprime XT primer/prep, followed by Tru Temp XT to form a black magnetite finish — all within 30 minutes. For optimum appearance and corrosion protection, the black finish can be sealed with a rust preventative topcoat. Birchwood says the finish is Mil-Spec and RoHS compliant, and withstands up to 120 hours of neutral salt spray or several hundred hours of humidity. The finish is a 0.5 microns thick (20 millionths) crystalline structure that allows it to hold a rust inhibitor while serving as a sacrificial barrier to provide break-in lubricity and galling resistance.
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Masking is employed in most any metal finishing operation where only a specifically defined area of the surface of a part must be exposed to a process. Conversely, masking may be employed on a surface where treatment is either not required or must be avoided. This article covers the many aspects of masking for metal finishing, including applications, methods and the various types of masking employed.