AMPP C3 EXAM SCRIPT UPDATED
COMPLETE QUESTIONS AND ANSWERS
GRADED APLUS
●● What needs to be present in order for corrosion to occur?
Answer: Anode
Cathode
Metallic Pathway
Electrolyte
●● What is an anode?
Answer: The anode is the area of the metal surface that corrodes. The
metal oxidizes (gains oxygen), causing it to lose mass and dissolve into
the electrolyte.
●● What is oxidation?
Answer: Oxidation is a chemical reaction that occurs at the anode where
the metal loses electrons.
●● What is a cathode?
Answer: The cathode is the area of the metal surface that reduces (loses
oxygen).
,●● What is reduction?
Answer: Reduction is a chemical reaction that occurs at the cathode that
involves the metal gaining electrons.
●● What is the metallic pathway?
Answer: The metallic pathway connects the anode to the cathode and
allows the passage of electrons generated from the cathode to the anode.
●● What is an electrolyte?
Answer: The electrolyte is the conductive medium (any solution, like
water) in which ions are carried from the anode to the cathode.
●● What is a barrier coating?
Answer: A barrier coating protects the substrate/metal by providing a
chemical and physical barrier between the metal surface and the
environment.
The barrier coating interrupts the electrolyte of the electrochemical cell.
●● What is passivation?
Answer: Passivation is when a layer of oxides form on the surface of a
metal that provides corrosion protection.
●● What is the purpose of the electrolyte?
, Answer: To allow the passage of ions from the anode to the cathode.
●● What is a sacrificial coating?
Answer: A sacrificial coating is a coating that contains a metal (usually
zinc) that will corrode instead of the metal substrate.
●● What is an inhibitive coating?
Answer: Inhibitive coatings act as aa barricade to slow down the
reaction at the anode, or cathode, or both. They contain special pigments
that react with moisture or oxygen and form a hard, non-reactive surface
film that interferes with the corrosion process.
●● What are the 4 basic components of a coating?
Answer: Pigments
Binder/Resins
Solvents
Additives
●● What is are pigments?
Answer: Pigments are the solid particles that give specific protective,
mechanical, or decorative qualities to the coating.
In its unmixed form, pigments are powders.
COMPLETE QUESTIONS AND ANSWERS
GRADED APLUS
●● What needs to be present in order for corrosion to occur?
Answer: Anode
Cathode
Metallic Pathway
Electrolyte
●● What is an anode?
Answer: The anode is the area of the metal surface that corrodes. The
metal oxidizes (gains oxygen), causing it to lose mass and dissolve into
the electrolyte.
●● What is oxidation?
Answer: Oxidation is a chemical reaction that occurs at the anode where
the metal loses electrons.
●● What is a cathode?
Answer: The cathode is the area of the metal surface that reduces (loses
oxygen).
,●● What is reduction?
Answer: Reduction is a chemical reaction that occurs at the cathode that
involves the metal gaining electrons.
●● What is the metallic pathway?
Answer: The metallic pathway connects the anode to the cathode and
allows the passage of electrons generated from the cathode to the anode.
●● What is an electrolyte?
Answer: The electrolyte is the conductive medium (any solution, like
water) in which ions are carried from the anode to the cathode.
●● What is a barrier coating?
Answer: A barrier coating protects the substrate/metal by providing a
chemical and physical barrier between the metal surface and the
environment.
The barrier coating interrupts the electrolyte of the electrochemical cell.
●● What is passivation?
Answer: Passivation is when a layer of oxides form on the surface of a
metal that provides corrosion protection.
●● What is the purpose of the electrolyte?
, Answer: To allow the passage of ions from the anode to the cathode.
●● What is a sacrificial coating?
Answer: A sacrificial coating is a coating that contains a metal (usually
zinc) that will corrode instead of the metal substrate.
●● What is an inhibitive coating?
Answer: Inhibitive coatings act as aa barricade to slow down the
reaction at the anode, or cathode, or both. They contain special pigments
that react with moisture or oxygen and form a hard, non-reactive surface
film that interferes with the corrosion process.
●● What are the 4 basic components of a coating?
Answer: Pigments
Binder/Resins
Solvents
Additives
●● What is are pigments?
Answer: Pigments are the solid particles that give specific protective,
mechanical, or decorative qualities to the coating.
In its unmixed form, pigments are powders.
