Question

what are the causes of corrosion? b. what are the methods to prevent corrosion​

Answer 1

Answer:

Causes of Corrosion

Metal corrodes when it reacts with another substance such as oxygen, hydrogen, an electrical current or even dirt and bacteria. Corrosion can also happen when metals like steel are placed under too much stress causing the material to crack.

What are the main causes of corrosion?

A- Uncontrolled humidity and corrosive gases are the primary causes of corrosion in industrial environments. Condensation of water vapor on metal surfaces and corrosive gases such as ammonia, chlorine, hydrogen oxides, sulfur oxides, etc. can result in corrosion of electronic equipment, rusty corners, and corroded parts.

Corrosion is a natural process that converts a refined metal into a more chemically stable form such as oxide, hydroxide, or sulfide. It is the gradual destruction of materials (usually a metal) by chemical and/or electrochemical reaction with their environment. Corrosion engineering is the field dedicated to controlling and preventing corrosion.

Rust, the most familiar example of corrosion

Volcanic gases have accelerated the extensive corrosion of this abandoned mining machinery, rendering it almost unrecognizable

Corrosion on exposed metal, including a bolt and nut

Side view of Crow Hall Railway Bridge, north of Preston, Lancashire rusting

In the most common use of the word, this means electrochemical oxidation of metal in reaction with an oxidant such as oxygen or sulfates. Rusting, the formation of iron oxides, is a well-known example of electrochemical corrosion. This type of damage typically produces oxide(s) or salt(s) of the original metal and results in a distinctive orange colouration. Corrosion can also occur in materials other than metals, such as ceramics or polymers, although in this context, the term "degradation" is more common. Corrosion degrades the useful properties of materials and structures including strength, appearance and permeability to liquids and gases.

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Answer 2

Explanation:

Slow destruction or damage of metals by chemical action is called corrosion. The main cause of corrosion is the atmospheric moisture. To prevent we need to paint the metal with airproof or waterproof material or we need to use oil and grease over metal or we need to use lead paint or need to use coal tar paint over metal or we need to do metal plating or we need to galvanized the metal or we need to do electro plating.