if there are two type of solution .one is low ph solution and other is high ph solution, in which solution metal will corrode faster? Justify Your Answer.
Answers
Answer:
Explanation:
Metals typically develop a passivation layer in moderately alkaline (high pH) solutions, which lowers the corrosion rate as compared to acidic (low pH) solutions. The passivation layer provides a measure of immunity to further corrosion (e.g. Ti, Ta).
However, the corrosion rates can be expected to be comparable in the transpassive region (i.e. highly alkaline versus highly acidic)
Effect of pH on corrosion of metal
Explanation:
Every substance has a chemical nature :
- Acidic
- Basic
- Neutral
It can be tested by checking its : pH
pH
It is negative of logarithm of hydrogen ion concentration .
Low pH -acidic character
High pH --Basic charcter
pH 7- Neutral character
- The metals when come in contact with certain components of air they get corroded (eaten up ).
Like, Iron corrode in presence of moist air .
Metals typically develop a special layer in alkaline medium that is at high pH that decreases the corrosion activity of metals .