| Blow Back | (english) A coating defect consisting of a lower coating film weight on the bottom of the coated sheet caused by high velocity air in the oven. Blow back usually occurs with high solids coatings which have little solvent to evaporate and "set" the film. |
| Blue Annealing | (english) Heating hot rolled ferrous sheet in an open furnace to a temperature within the transformation range and then cooling in air, in order to soften the metal. The formation of a bluish oxide on the surface is incidental. |
| Blue Vitriol Copper sulfate | (english) A layout solution which turns a copper color when applied to a clean,polished metal surface. |
| Blush | (english) A coating defect consisting of the whitening of a cured film which results in a translucent or opaque appearance with accompanying loss of gloss. Blushing usually occurs during the pasteurization or steam processing of films which are undercured or water sensitive. |
| Body-Centered | (english) Having the equivalent lattice points at the corners of the unit cell, and at its center; sometimes called centered, or space-centered. |
| Boil | (english) Agitation of a bath of metal caused by the liberation of a gas beneath its surface. May be deliberately induced by the addition of oxidizing material to a bath containing excess carbon. In the later case it is called a carbon boil and CO or CO2 are liberated. |
| Boiler | (english) A closed vessel in which water, is transformed into steam at a given pressure and temperature under controlled conditions. |
| BOLT KIT | (english) A set of bolts or screws that ore selected to suit a particular application, i.e. pre-selected length, threads and strength to match the mounted component. |
| Bonderized Coating | (english) A thin film of phosphate pretreatment applied to a steel surface (bare or zinc coated) to enhance paintability. |
| Bonderizing | (english) The coating of steel with a film composed largely of zinc phosphate in order to develop a better bonding surface for paint or lacquer. |