AMPP CIP Level 1 Theory Questions With 100% Correct Answers.

What is corrosion? - The deterioration of a metal or alloy that results from an electrochemical reaction with its environment. What needs to be present in order for corrosion to occur? - Anode Cathode Metallic Pathway Electrolyte What is an anode? - 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? - Oxidation is a chemical reaction that occurs at the anode where the metal loses electrons. What is a cathode? - The cathode is the area of the metal surface that reduces (loses oxygen). What is reduction? - Reduction is a chemical reaction that occurs at the cathode that involves the metal gaining electrons. What is the metallic pathway? - 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? - 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? - 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? - 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? - To allow the passage of ions from the anode to the cathode. What is a sacrificial coating? - 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? - 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.