Question

Question 12:
In day to day life it is observed that painted window grills remains protected from corrosion whereas grills without paint undergoes corrosion. This represent which
type of corrosion?​

Answer 1

Answer:

Usually grills of doors and windows are made of iron and iron objects get rusted on exposure to moist air. Since air always contains moisture, iron grills get rusted.

Painting iron objects prevents rusting, hence iron grills of doors and windows are painted before they are used.

hope it helps you ☺️

please mark me as brainliest.

Answer 2

In day-to-day life, it is observed that painted window grills remain protected from corrosion whereas grills without paint undergo corrosion. this type of corrosion is known as galvanic corrosion.

• Corrosion is the degradation of metal surfaces due to pH, moisture, temperature, and many other environmental factors.
• Types of corrosion are uniform corrosion, pitting corrosion, intergranular corrosion, crevice corrosion, galvanic corrosion, etc.
• The corrosion due to an aqueous environment and degradation of metal occurs due to oxidation of metal surface is known as uniform corrosion.
• In pitting corrosion anode and cathode parts form like cells and form holes in metal surfaces.
• Crevice corrosion is due to differences in the concentration at the surface.
• Galvanic corrosion is caused due to exposure of surface at high temperatures.
• Corrosion is prevented by coating the surface with painting or greasing.
• Painted window grills are protected from galvanic corrosion.

#SPJ2