Ads
related to: hot caustic bluing process
Search results
Results From The WOW.Com Content Network
The "hot" process is an alkali salt solution using potassium nitrite or sodium nitrate and sodium hydroxide, referred to as "traditional caustic black", that is typically done at an elevated temperature, 135 to 155 °C (275 to 311 °F).
The NaOH (caustic soda) and elevated temperature cause Fe 3 O 4 (black oxide) to form on the surface of the metal instead of Fe 2 O 3 (red oxide; rust). While it is physically denser than red oxide, the fresh black oxide is porous, so oil is then applied as post treatment to the heated part, which seals it by "sinking" into it.
Bluing (steel) is a passivation process in which steel is partially protected against rust Bluing may also refer to: Bluing (fabric), a blue dye used to improve the appearance of fabrics; Bluing (hair), a blue dye used to improve the appearance of hair "bluing" of machine parts to check for tolerances, see engineer's blue
Aircraft battling fires raging through the Los Angeles area are dropping more than water: Hundreds of thousands of gallons of hot-pink fire suppressant ahead of the flames in a desperate effort to ...
In physical chemistry and engineering, passivation is coating a material so that it becomes "passive", that is, less readily affected or corroded by the environment. . Passivation involves creation of an outer layer of shield material that is applied as a microcoating, created by chemical reaction with the base material, or allowed to build by spontaneous oxidation
Blake Lively is once again facing backlash over a resurfaced clip in which she admits to doing blackface. The actress, who is in the midst of a legal battle with her It Ends With Us co-star and ...
5. Club Sub. I respect that Mike knows that a club sandwich needs mayo, and adds it here. That’s a little thing called knowing your product. The bacon’s great, the turkey’s great, and the ...
Black oxide is but one type of bluing for firearms; there are other types of bluing used on firearms, too. (Hot bluing vs. cold bluing, and hot bluing versus "hot and cold" mixed bluing, for example.) Black oxide is also used to refer to thicker bluing that is black oxide based.