Question

what is the difference between Aqueous Environment corrsion and High temperate Environment corrsion?

Q2) what is the difference between cathode and anode?

Please solve them in easy way, clear writing, and show the differences

Answer 1

DIFFERENCE BETWEEN CATHODE AND ANODE:

Cathode is negatively charged electrode and anode is positively charged eletrode the ions that move towards cathode are positively charged and are called cations and the ones that move towards anode are called anions.

The cathode is negatively charged and all the positively charged cations move towards it and accept electron to deposit as neutral atoms on the cathode .

Anode donates electrons meaning it releases charged ions which decreases the size of the anode this causes flow of electron from anode to cathode and maintains an electric current.

DIFFERENCE BETWEEN AQUEOUS ENVIRONMENT COROSSION AND HIGH TEMPERATURE COROSSION :

Corrosion is a general term used to describe various interactions between a material and its environment leading to a degradation in the material properties.
Interaction with ambient oxygen can cause the formation of oxide layers via diffusion controlled growth. These may passivate the material against further oxidation.

Aqueous environment corrosion :

In a wet environment, aqueous corrosion can occur due to electrochemical processes which depend upon metal ion transport and reaction. Gradients of metallic and electrolytic ion concentrations, temperature, ambient pressure, and the presence of other metals, bacteria, or active cells, all influence the corrosion rate.
· Electric fields applied to corroding systems can accelerate or inhibit the rate of corrosion or material deposition. Galvanic corrosion between different metals in an aqueous environment is due to the electric field arising from the different electrode potential of the two materials. External fields may enhance or supress this corrosion.
· In all of these reactions, electron and ionic transport occurs. The following sections will be concerned with these processes and the effect of conditions on the corrosion rates.

HIGH TEMPERATURE ENVIRONMENT COROSSION :

High-temperature corrosion is a chemical attack from gases, solid or molten salts, or molten metals, typically at temperatures above 750ºF (400°C).

Industrially, high-temperature corrosion is a significant issue. Any component that is exposed to a high temperature in a non-inert environment is potentially at risk.

Different types of high-temperature corrosion include:

• Carburization
• Chlorination
• Flue gas and deposit corrosion
• Nitridation
• Oxidation
• Sulphidation.