Q.1.
Which of the following method is adopted for preventing corrosion by acids?
Q.2.
Which of the following method is adopted for preventing corrosion by salts?
Q.3.
Which of the following method is adopted for preventing corrosion by moisture?
Q.4.
The organic or inorganic substances which when added to the environment are able to reduce the rate of corrosion are called ___________
Q.5.
Which of the following readily sublime and form a protective layer on the metal surface?
Q.6.
Which of the following is not an anodic inhibitor?
Q.7.
The process by which Ta, Nb and Ti combine with carbon to form respective carbides and prevent corrosion is known as ___________
Q.8.
The process which lowers the content of sulphur and phosphorus in steels is known as ___________
Q.9.
Annealing is a heat treatment given to metals to ___________
Q.10.
Anodised oxide coatings are used for the protection of Al, Zn, Mg and their alloys from corrosion.
Q.11.
Which of the following statement is incorrect about the anodic coating?
Q.12.
Organic coating is inert organic barrier whose protective value depends upon its impermeability to gases, salts and water.
Q.13.
Electrochemical protection is ___________
Q.14.
Magnesium is used in high resistivity electrolytes due to its ___________
Q.15.
Which of the following metal is not used as a sacrificial anode?