In electrochemistry, a valve metal is a metal which passes current in only one direction. Usually, in an electrolytic cell, it can function generally as a cathode, but not generally as an anode because a (highly resistive) oxide of the metal forms under anodic conditions.[1] Valve metals include commonly aluminium, titanium, tantalum, and niobium. Other metals may also be considered as valve metals, such as tungsten, chromium, zirconium, hafnium, zinc, vanadium, bismuth or antimony.[2]
^"Electrochemistry Dictionary". Retrieved 11 May 2021.
^US patent 7248462, "Method of anodizing valve metal derived anode bodies and electrolyte therefore"
oxide of the metal forms under anodic conditions. Valvemetals include commonly aluminium, titanium, tantalum, and niobium. Other metals may also be considered...
A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to...
these metals, but is often traditionally considered a precious metal in light of its role in coinage and jewelry. In electrochemistry, a valvemetal is a...
The Schrader valve (also called American valve) is a type of pneumatic tire valve used on virtually every motor vehicle in the world today. The Schrader...
or seat upon which the diaphragm closes the valve. The valve body may be constructed from plastic, metal, wood or other materials depending on the intended...
Modern versions often consist of flexible metal or composite materials (fiberglass or carbon fiber). Reed valves, normally a leather flap covering a hole...
A valve is a device or natural object that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening...
homemade piston valves for use in pneumatic cannon. Valves are typically constructed primarily from pipe fittings and machined plastics or metals. The inside...
A butterfly valve is a valve that isolates or regulates the flow of a fluid. The closing mechanism is a disk that rotates. Operation is similar to that...
A solenoid valve is an electromechanically operated valve. Solenoid valves differ in the characteristics of the electric current they use, the strength...
Pneumatic valve springs are metal bellows filled with compressed air used as an alternative to the metal wire springs used to close valves in high-speed...
aortic valve is a valve in the heart of humans and most other animals, located between the left ventricle and the aorta. It is one of the four valves of the...
Valve guides are cylindrical metal bushes, pressed or integrally cast into the cylinder head of most types of reciprocating engines, to support the poppet...
a choke valve or choke modifies the air pressure in the intake manifold, thereby altering the air–fuel ratio entering the engine. Choke valves are generally...
An artificial heart valve is a one-way valve implanted into a person's heart to replace a heart valve that is not functioning properly (valvular heart...
initial desmodromic development, valve springs were a major limitation on engine performance because they would break from metal fatigue. In the 1950s new vacuum...
An isolation valve is a valve in a fluid handling system that stops the flow of process media to a given location, usually for maintenance or safety purposes...
A gate valve, also known as a sluice valve, is a valve that opens by lifting a barrier (gate) out of the path of the fluid. Gate valves require very little...
A shutdown valve (also referred to as SDV or emergency shutdown valve, ESV, ESD, or ESDV; or safety shutoff valve) is an actuated valve designed to stop...
Electrolytic capacitors use a chemical feature of some special metals, previously called "valvemetals", which on contact with a particular electrolyte form a...
A vacuum tube, electron tube, valve (British usage), or tube (North America), is a device that controls electric current flow in a high vacuum between...
Electrolytic capacitors use a chemical feature of some special metals, historically called valvemetals, which can form an insulating oxide layer. Applying a positive...
A POL valve (originally for Prest-O-Lite) is a gas connection fitting used on liquefied petroleum gas (LPG) cylinders. The oldest standard for such connections...
alphabetic order: Coinage metals – Various metals used to mint coins, primarily the group 11 elements Cu, Ag, and Au. Earth metal – Old historic term, usually...
alternative to valve repair. There are four procedures Aortic valve replacement Mitral valve replacement Tricuspid valve replacement Pulmonary valve replacement...
Valve leakage refers to flow through a valve which is set in the 'off' state. The importance of valve leakage depends on what the valve is controlling...
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