NACE CIP Level 1 Study Guide With Correct Answers Graded A+

Define Corrosion - The deterioration of a substance, usually a metal from a reaction with its environment What is passivation? - A layer of oxides formed on the surface of a metal that provides corrosion protection. What is an example of passivation? - Stainless Steel What are the elements of a corrosion cell? - Anode, Cathode, Metallic Pathway, Electrolyte Describe what happens at the anode. - The metal dissolves into the electrolyte What is the function of the electrolyte? - Allows the passage of ions to connect the corrosion cell What is the function of the metallic pathway? - Allows the flow of electrons to connect the corrosion cell What is the galvanic series? - A listing of metals in order of reactivity (more or less noble) in seawater at 25 C The general rules of galvanic corrosion are: - The less noble (or more reactive) metal when connected to a more noble (or less reactive metal) will corrode preferentially Name the five most important factors that affect the rate of corrosion. - Humidity, oxygen, chemical salts, pollutants, temperature General corrosion is: - Results in a relatively uniform loss of material over the entire surface, Results in a general thinning of the affected surface, Relatively easy to inspect, Does not casue catastrophic failuresLocalized corrosion is: - Typically pitting and crevice corrosion. It is typically of the most concern as damage is concentrated and loss of integrity or structural failure can result.