Definitions Flashcards
(18 cards)
Cleaners that remove soil by chemical attack, they dissolve the reaction products. The are usually composed of fairly strong acids, such as phosphoric acid, with small quantities of surfactants, water-miscible solvents, and organic wetting and emulsifying agents.
Acidic Cleaners.
Cleaners that saponify most oils and greases and their surface active components wash away other contaminants. These cleaners may also saponify certain coating vehicles.
Alkaline Cleaners.
Relatively expensive abrasives that are justified by their special properties. Their particles retain sharp cutting edges and are especially effective on hard-base materials which may resist effective blasting my chilled cast iron grit.
Ceramic Grit.
Relatively cheap abrasives that are formed from metallurgical processes or combustion. Copper, Nickel, and aluminium are common.
Crushed Slag.
Cleaners that are composed of buffering salts, dispersants, soaps, and inhibitors. They function by wetting, emulsifying, dispersing, and solubilizing the contaminants, which can be washed away using water (usually hot) or steam.
Detergents.
Blasting that uses a highly concentrated stream of grit projected at a surface via air to remove rust, mill scale, or other contaminants, creating a rough surface that is good for adhesion.
Dry Grit Blasting/Air Blasting.
Cleaners that are sprayed onto the surface where they function by wetting, emulsifying, dispersing, and solubilizing the contaminants.
Emulsion Cleaners.
Surfaces joined to create a friction grip.
Faying Surfaces.
Sharp indentations in the substrate.
Gouges.
A non metallic phase, such as oxide, sulfide, or silicate particles in a metal.
Inclusions.
Solvents such as kerosene, turpentine, naptha, mineral spirits, toluol, xylol, etc, that clean the metal by dissolving and diluting the oil and grease contamination the surface.
Organic solvents.
Check of the surfaces for contamination before surface prep begins. This involves removing all visible oil, grease, soil, drawing and cutting compounds, and other soluble contaminants from the surface.
Pre-cleaning.
The most common surface defect on steel substrates. It is typically caused by rolling the steel.
Surface Lamination.
The irregular peak and valley on a bare surface that can result from operations such as abrasive blast cleaning or power tool cleaning.
Surface Profile.
This permits abrasive velocity up to 450 mph or 660 ft per second with an almost equal impact over the entire surface. The are the most effect for tough cleaning jobs.
Venturi Nozzles
Use of water with abrasive included in the stream or using wet abrasive. If no abrasive is used, it is water cleaning or WJ.
Water Blasting.
Use of standard jetting water discharged from a nozzle at pressures of 10,000 psi) or greater to prepare a surface for coating.
Waterjetting.
Particles of molten metal produced during welding and thrown onto the surface adjacent to the weld.
Weld Splatter (aka Weld Spatter.
