- Oxidation
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- One of the processes by which Enamel paint cures, by combining oxygen in the air with the paint film. This process dries and continues to harden enamel for several weeks. Oxidation also results in Chalking in older paint.
- A chemical reaction which increases the oxygen content of a compound or in which a compound or radical loses electrons, i.e., in which the positive valence is increased. Compare Reduction
- A form of corrosion caused by reacting a substance with oxygen. Rust (iron oxide) is a typical example.
Also see
- Oxidation catalyst
- (OC) type of bead material in catalytic converter which aids in oxidation of CO and HC
Also see
- Oxides of nitrogen
- (NOx) Regulated air pollutants, primarily NO and NO2 but including other
substances in minute concentrations. Under the high pressure and temperature conditions
in an engine, nitrogen and oxygen atoms in the air react to form various NOx. Like
hydrocarbons, NOx are precursors to the formation of smog. They also contribute to the
formation of acid rain.
Also see
- Oxidize
- Action where surface of metal is combined with oxygen in the air to produce rust, Scale, etc.
- Oxidizer
- A compound which gives up oxygen easily, removes hydrogen from another compound, or attracts electrons.
Also see
- Oxidizing
- The combining of oxygen with any other substance. For example, a metal is oxidized when the metal is burned, i.e., oxygen is combined with all the metal or parts of it.
- Oxidizing agent
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- A compound which gives up oxygen easily, removes hydrogen from another compound, or attracts electrons
- Any substance such as oxygen and chlorine, that can accept electrons. When oxygen or chlorine is added to wastewater, organic substances are oxidized. These oxidized organic substances are more stable and less likely to give off odors or to contain disease bacteria.
- Oxidizing catalyst
- A catalyst which decreases CO and HC levels using excess air. Compare Reducing catalyst
- Oxidizing converter
- A converter with a conventional oxidation catalyst that needs a secondary air supply to convert hydrocarbons and carbon monoxide to carbon dioxide and water; does not control NOx. Compare Single-bed oxidizing converter
Also see
- Oxidizing flame
- Flame produced by an excess of oxygen in the torch mixture, leaving some free oxygen which tends to burn the molten metal.
- OXS
- Acronym for Oxygen sensor
- Oxyacetylene welding
-
See
- Oxygen-acetylene welding. Also called Gas welding
- Oxygen
- A gas formed of the element oxygen. When it very actively supports combustion it is called burning; when it slowly combines with a substance it is called oxidation.
- Oxygen acetylene cutting
- Cutting metal using the oxygen jet which is incorporated with an oxygen-acetylene, preheating flame or flames.
- Oxygen-acetylene welding
- A method of welding, using as a fuel a combination of the two gases - oxygen and acetylene.
- Oxygenated Fuel
- Any fuel substance containing oxygen, such as Ethanol, Methanol, or Biodiesel. Oxygenated fuel tends to give a more complete combustion of its carbon into CO2, thereby reducing emissions of hydrocarbons and carbon monoxide. Oxygenated fuels may result in increased nitrogen oxides emissions.
- Oxygenated gasoline
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- Any fuel with a mixture of ethyl or methyl Alcohol. The addition of oxygen causes a slightly leaner Fuel-air mixture which is especially beneficial with older vehicles.
- Finished motor gasoline, other than reformulated gasoline, having an oxygen content of 2.7 percent or higher by weight and required by the U.S. EPA to be sold in areas designated by the EPA as CO nonattainment areas. Oxygenated gasoline excludes oxygenated fuels program reformulated gasoline (OPRG) and reformulated gasoline blendstock for oxygenate blending (RBOB).
- Oxygenates
- An oxygen-enriched fuel or anti-knock additive. Substances which, when added to gasoline, increase the amount of oxygen in that gasoline blend. Ethanol, MTBE, ETBE, and Methanol are common oxygenates.
- Oxygen corrosion
- An electrochemical corrosion caused by neutral or alkaline electrolytes in which, during the cathodic reaction, oxygen is reduced to hydroxide
- Oxygen cylinder
- A specially built container manufactured according to I.C.C. Standards and used to store and ship certain qualities of oxygen.
- Oxygen regulator
- An automatic valve used to reduce cylinder pressures to torch pressures and to keep the pressures constant. They are never to be used as acetylene regulators.
- Oxygen sensor
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(OXS) A pollution control device which measures the amount of oxygen in the Exhaust stream and sends that information the ECM. It controls the Fuel-air mixture entering the engine. Also called a Lambda sensor, Exhaust oxygen sensor, or an O2 sensor
Oxygen sensor
Also see
- Oxygen sensor system thermo-switch
- A sensor of a fuel injection system that is usually located in a coolant hose to provide a coolant temperature signal to the ECM
- Oxygen Storage Capacity
- (OSC) A capacity of the Catalyst washcoat to store oxygen at lean and to release it at rich condition. Typically provided by cerium oxide (ceria), which oscillates between an oxidized and reduced state, depending on the exhaust gas chemistry. The OSC is an important component of three-way Catalysts, used to extend the Catalyst window.
- Oxygen-to-carbon ratio
- The ratio of the number of oxygen atoms to the number of carbon atoms in the fuel (e.g., Methanol would have a ratio of 1, ethanol would have 0.5).
- Oxyhydrogen gas
- A highly explosive mixture of oxygen and hydrogen, generated during charging of lead-acid batteries. Compare Gassing