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What is the electrochemical corrosion and explain the mechanism of rust forming in acid?
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∙ 10y ago
methanol-oxygen fuel cell
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∙ 10y ago
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What is corrosion resistance?
The ability of the metal to resist corrosion in atmosphere with moist.corrosion ocuurs in ferrous materials in which ferrous chemically react with oxygen forming rust or corrosion. Corrosion can be avoided by Heat treatment and surface coating .
What are three ways to protect metal from corrosion and how do they work to stop it?
Here are four ways (adapted from the related link): Corrosion control Protective coatings: Most widely used corrosion control technique. Protective coatings protect metal from corrosion by separating the surfaces that are susceptible to corrosion from the factors in the environment which cause corrosion to occur. Cathodic protection: interferes with the natural action of the electrochemical cells that are responsible for corrosion. Cathodic protection can be effectively applied to control corrosion of surfaces that are immersed in water or exposed to soil. Corrosion inhibitor: Uses one or more of these mechanisms: Adsorption as a thin film on the surface of a corroding material; inducing formation of a thick corrosion product; forming a passive film on the metal surface; changing characteristics of the environment either by producing protective precipitates or by removing or inactivating an aggressive constituent.
What are some methods in minimizing corrosion among metals?
Metals are usually treated with a coating that helps minimize the forming of corrosion. Steel is treated to galvanize it from developing rust, which is a type of corrosion. Electroplating is another way to minimize corrosion in metals.
Is corrosion of metals physical or chemical change?
It is a chemical change, where a chemical such as oxygen or chlorine combines with a metal, forming an oxide or chloride of that metal.
When is gravitational contraction an important energy generation mechanism for the Sun?
It was important when the Sun was forming a shrinking interstellar cloud of gas.
In scientific inquiry making an observation typically leads to?
Forming a hypothesis - to explain the observation.
Why iron pillar in qutab minar complex never rusted?
corrosion resistance by hydrogen phosphate forming on the high phosphorus content iron
Is corrosion of aluminium metal a physical process?
No, corrosion of aluminum metal is a chemical process. It occurs when aluminum reacts with oxygen in the presence of moisture, forming a layer of aluminum oxide on the surface. This chemical reaction leads to the degradation of the metal over time.
What is crevice corrosion?
(metallurgy) Corrosive degradation of metal parts at the crevices left at rolled joints or from other forming procedures; common in stainless steel heat exchangers in contact with chloride-containing fluids or other dissolved corrosives. Also known as contact corrosionRead more: crevice-corrosion
What is the role of the platelates in the body?
Platelets help in the 'Blood clotting mechanism' of the body by forming fibrin polymers with the help of many factors.
How does a zoologist use science?
By studying (observation), forming hypotheses, validating, making models, using the models to explain the facts.
Why can aluminum resist corrosion?
When exposed to air the surface of a piece of aluminum will oxidize and form a coating of aluminum oxide, known in its mineral form as corundum. Aluminum oxide is one of the hardest substances on Earth and so protects the aluminum from further oxidation. It is possible to get aluminum to corrode. Mercury will prevent the oxide from forming a protective coating.
