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They usually have an iron horseshoe-shaped insert, called a heel iron, to strengthen the heel, and an iron toe-piece. They may also have steel toecaps . The hobnails project below the sole and provide traction on soft or rocky terrain and snow, but they tend to slide on smooth, hard surfaces.
It is named after the blue-black appearance of the resulting protective finish. Bluing involves an electrochemical conversion coating resulting from an oxidizing chemical reaction with iron on the surface selectively forming magnetite (Fe 3 O 4), the black oxide of iron. In comparison, rust, the red oxide of iron (Fe 2 O
Late medieval gothic plate armour with list of elements. The slot in the helmet is called an occularium. This list identifies various pieces of body armour worn from the medieval to early modern period in the Western world, mostly plate but some mail armour, arranged by the part of body that is protected and roughly by date.
The coating chemistry is waterborne enamel based on epoxy, an aminoalcohol adduct, and blocked isocyanate, which all crosslink on baking to form an epoxy-urethane resin system. [ 1 ] E-coat resin technology, combined with the excellent coverage provided by electrodeposition, provides one of the more effective coatings for protecting steel from ...
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They are of interest historically, and are also useful for hobbyists to form black oxide safely with little equipment and without toxic chemicals. Low temperature oxide, also described below, is not a conversion coating—the low-temperature process does not oxidize the iron, but deposits a copper selenium compound.
The family of a 20-year-old man is speaking out after he was found dead at the bottom of a hotel elevator shaft in Turkey while reportedly on his first vacation with his girlfriend.