WorksheetsUnderstanding Corrosion and Its Effects
Total questions: 15
Worksheet time: 5mins
Which type of corrosion occurs when two different metals are in electrical contact in the presence of an electrolyte?
Uniform corrosion
Galvanic corrosion
Pitting corrosion
Crevice corrosion
Which of the following is NOT a method used to prevent corrosion in metals?
Painting
Cathodic protection
Increasing humidity
Alloying
What is the main electrochemical reaction involved in the rusting of iron?
Reduction of oxygen
Oxidation of iron
Reduction of iron
Oxidation of oxygen
Which metal is most likely to corrode rapidly in a marine environment?
Stainless steel
Aluminium
Mild steel
Copper
Which environmental factor most significantly accelerates corrosion?
Low temperature
Dry air
High humidity
Low oxygen concentration
Which of the following is a localised form of corrosion that results in small holes in the metal?
Uniform corrosion
Pitting corrosion
Stress corrosion
Intergranular corrosion
Which equation best represents the overall reaction for the rusting of iron?
4Fe+3O2→2Fe2O3
2Fe+O2+2H2O→2Fe(OH)2
Fe+H2O→FeO+H2
Fe2O3+3H2O→2Fe(OH)3
Which corrosion prevention method involves applying a thin layer of another metal to the surface?
Galvanising
Anodising
Passivation
Tempering
Which of the following is a technique used to test for corrosion in metals?
Tensile testing
Salt spray test
Hardness test
Charpy impact test
Which of the following metals forms a protective oxide layer that prevents further corrosion?
Iron
Zinc
Aluminium
Lead
What is the primary role of a sacrificial anode in cathodic protection?
To increase the rate of corrosion
To corrode instead of the protected metal
To decrease the electrical conductivity
To act as an insulator
Which of the following is NOT considered an environmental factor affecting corrosion?
Temperature
Humidity
pH of the environment
Colour of the metal
Which type of corrosion occurs along the grain boundaries of a metal?
Pitting corrosion
Intergranular corrosion
Uniform corrosion
Galvanic corrosion
Which of the following is a chemical method for preventing corrosion?
Applying grease
Using corrosion inhibitors
Electroplating
Using sacrificial anodes
Which test is commonly used to measure the thickness of corrosion products on a metal surface?
Ultrasonic thickness measurement
Salt spray test
Tensile test
Charpy impact test
