What is performance degradation?
Performance degradation includes the absence of or deficiency with Design Features for which credit has been taken in the Documented Safety Analysis. Performance degradation does not include:
What does degradation mean in construction?
- Definition from Corrosionpedia What Does Degradation Mean? Degradation is a process that renders an object useless or less useful over time. Degradation can be caused by many different means, and it is almost always considered an undesirable process.
What is meant by failure?
Failure or degradation of a facility, process, system, or component that reduces the reliability of critical components of the facility whose loss or degradation prevents the system from performing its intended function.
What is corrosion or degradation?
Corrosion or degradation involves deterioration of material when exposed to an environment resulting in the loss of that material, the most common case being the corrosion of metals and steel by water. The changes brought about by corrosion include weight loss or gain, material loss, or changes in physical and mechanical properties.
What Does Degradation Mean?
How does corrosionpedia explain degradation?
How can products and structures be protected from chemical degradation?
Why are hardened materials hardfaced?
What is the process that causes a material to become less useful over time?
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Degradation - Definition, Meaning & Synonyms | Vocabulary.com
degradation: 1 n changing to a lower state (a less respected state) Synonyms: debasement Types: show 12 types... hide 12 types... dehumanisation , dehumanization the act of degrading people with respect to their best qualities animalisation , animalization , brutalisation , brutalization an act that makes people cruel or lacking normal human ...
Degradation Definition & Meaning | Dictionary.com
Degradation definition, the act of degrading. See more.
What is Degradation? - Definition from Safeopedia
Safeopedia Explains Degradation. When a compound or a substance is exposed to physical agents like heat, humidity or chemical agents, this has effects on the physical (or sometimes chemical) properties of that compound or substance.
Degradation Definition & Meaning - Merriam-Webster
The meaning of DEGRADATION is the act or process of degrading. How to use degradation in a sentence.
Corrosion and Material Degradation | Encyclopedia.com
Corrosion and material degradation Corrosion or degradation involves deterioration of material when exposed to an environment resulting in the loss of that material, the most common case being the corrosion of metals and steel by water. The changes brought about by corrosion include weight loss or gain, material loss, or changes in physical and mechanical properties.
Land Degradation: Meaning, Causes and Prevention of Land Degradation
ADVERTISEMENTS: Read this article to learn about the meaning, factors responsible, prevention and control measures of land degradation: The change in the characteristic and quality of soil which adversely affect its fertility is called as Degradation. ADVERTISEMENTS: Land degradation is the major consequences of direct interference of human activities in the natural phenomenon. Land ...
What Does Degradation Mean?
Degradation is a process that renders an object useless or less useful over time. Degradation can be caused by many different means, and it is almost always considered an undesirable process. Preventing and combating the degradation of a part, product or structure is a major challenge that many engineers face.
How does corrosionpedia explain degradation?
Corrosionpedia Explains Degradation. There are many avenues through which degradation may occur. One of the most common ways is through physical wear, such as when a material consistently rubs against another material.
How can products and structures be protected from chemical degradation?
Products and structures can be protected from chemical degradation by selecting only those materials that do not dissolve in the solutions they will be exposed to. For example, a part might constructed from gold, which hydrochloric acid cannot dissolve. Advertisement.
Why are hardened materials hardfaced?
To prevent degradation caused by physical contact, many products are made out of hardened materials that resist wear and indentation. Materials can also be hardfaced in areas that are subject to localized physical contact with other substrates.
What is the process that causes a material to become less useful over time?
Chemical degradation is another process that can cause a material to become less useful over time. For example, exposure to hydrochloric acid can dissolve and degrade steel over time. Degradation prevention is a significant design consideration for many products and structures.
Reversible Reductions in Output Power
A PV module may be producing reduced output for reversible reasons. It may be subject to shading, for example, by a tree which has grown in front of it. The front surface may be soiled (PV modules will generally experience up to 10% loss of output due to front surface soiling).
Degradation and Failure of PV Modules
Degradation mechanisms may involve either a gradual reduction in the output power of a PV module over time or an overall reduction in power due to failure of an individual solar cell in the module.
By-Pass Diode Failure
By-pass diodes, used to overcome cell mismatching problems, can themselves fail, usually due to overheating, often due to undersizing 1. The problem is minimised if junction temperatures are kept below 128°C.
Encapsulant Failure
UV absorbers and other encapsulant stabilizers ensure a long life for module encapsulating materials. However, slow depletion, by leaching and diffusion does occur and, once concentrations fall below a critical level, rapid degradation of the encapsulant materials occurs.
What does degradation mean?from merriam-webster.com
English Language Learners Definition of degradation. somewhat formal. : the act or process of damaging or ruining something. : the act of treating someone or something poorly and without respect. See the full definition for degradation in the English Language Learners Dictionary.
What is degradation in communications?from its.bldrdoc.gov
The deterioration in quality, level, or standard of performance of a functional unit. 2. In communications, a condition in which one or more of the required performance parameters fall outside predetermined limits, resulting in a lower quality of service.
What is the process of corrosion?
Thus the process of corrosion is basically electrochemical. For corrosion to occur, certain conditions must be present. These are: (1) a potential difference between the cathode and the anode to drive the reaction; (2) an anodic reaction; (3) an equivalent cathodic reaction; (4) an electrolyte for the internal circuit;
What is corrosion in metals?
Corrosion or degradation involves deterioration of material when exposed to an environment resulting in the loss of that material, the most common case being the corrosion of metals and steel by water. The changes brought about by corrosion include weight loss or gain, material loss, or changes in physical and mechanical properties.
How to prevent corrosion in metals?
Some measures adopted to prevent corrosion in metals are cathodic protection, use of inhibitors, coating, and the formation of a passivating film. Protection of concrete, on the other hand, can be achieved by coating, avoiding corrosive pH of the water with which the concrete is in contact, avoiding excessive concentrations of ammonia, and avoiding deaeration in pipes.
How does metal corrosion occur?
Metal corrosion involves oxidation-reduction reactions in which the metal is lost by dissolution at the anode (oxidation). The electrons travel to the cathode where the reduction takes place, while s move through a conducting solution or electrolyte.
Does polarization cause corrosion?
It has been reported that polarization may retard corrosion, as in the accumulation of unreacted hydrogen on the cathode. In the corrosion of iron in water, the reactions differ according to whether or not oxygen is present.
Does concrete degrade?
Degradation of concrete, on the other hand, depends on the composition of cement and the aggressive action of the water in contact with it. Some forms of corrosion may be visibly apparent, but some are not. Surface corrosion, corrosion at discrete areas, and anodic attack in a two-metal corrosion may be readily observed. A less identifiable form, erosion-corrosion, is caused by flow patterns that cause abrasion and wear or sweep away protective films and accelerate corrosion. Another form of corrosion which involves the selective removal of an alloy constituent requires another means of examination. Cracking, a form of corrosion which is caused by the simultaneous effects of tensile stress and a specific corrosive medium, could be verified by microscopy.
What Does Degradation Mean?
Degradation is a process that renders an object useless or less useful over time. Degradation can be caused by many different means, and it is almost always considered an undesirable process. Preventing and combating the degradation of a part, product or structure is a major challenge that many engineers face.
How does corrosionpedia explain degradation?
Corrosionpedia Explains Degradation. There are many avenues through which degradation may occur. One of the most common ways is through physical wear, such as when a material consistently rubs against another material.
How can products and structures be protected from chemical degradation?
Products and structures can be protected from chemical degradation by selecting only those materials that do not dissolve in the solutions they will be exposed to. For example, a part might constructed from gold, which hydrochloric acid cannot dissolve. Advertisement.
Why are hardened materials hardfaced?
To prevent degradation caused by physical contact, many products are made out of hardened materials that resist wear and indentation. Materials can also be hardfaced in areas that are subject to localized physical contact with other substrates.
What is the process that causes a material to become less useful over time?
Chemical degradation is another process that can cause a material to become less useful over time. For example, exposure to hydrochloric acid can dissolve and degrade steel over time. Degradation prevention is a significant design consideration for many products and structures.
Reversible Reductions in Output Power
Degradation and Failure of PV Modules
- Degradation mechanisms may involve either a gradual reduction in the output power of a PV module over time or an overall reduction in power due to failure of an individual solar cell in the module.
By-Pass Diode Failure
- By-pass diodes, used to overcome cell mismatching problems, can themselves fail, usually due to overheating, often due to undersizing 1. The problem is minimised if junction temperatures are kept below 128°C.
Encapsulant Failure
- UV absorbers and other encapsulant stabilizers ensure a long life for module encapsulating materials. However, slow depletion, by leaching and diffusion does occur and, once concentrations fall below a critical level, rapid degradation of the encapsulant materials occurs. In particular, browning of the EVA layer, accompanied by a build-up of acetic acid, has caused gra…