NACE CIP Level 1 Study Guide Exam Questions And Answers

Define Corrosion - ANS The deterioration of a substance, usually a metal from a reaction with its environment What is passivation? - ANS A layer of oxides formed on the surface of a metal that provides corrosion protection. What is an example of passivation? - ANS Stainless Steel What are the elements of a corrosion cell? - ANS Anode, Cathode, Metallic Pathway, Electrolyte Describe what happens at the anode. - ANS The metal dissolves into the electrolyte What is the function of the electrolyte? - ANS Allows the passage of ions to connect the corrosion cell What is the function of the metallic pathway? - ANS Allows the flow of electrons to connect the corrosion cell What is the galvanic series? - ANS A listing of metals in order of reactivity (more or less noble) in seawater at 25 C The general rules of galvanic corrosion are: - ANS 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. - ANS Humidity, oxygen, chemical salts, pollutants, temperature General corrosion is: - ANS 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 failures Localized corrosion is: - ANS 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. List some of the common tools/methods used for corrosion control. - ANS Design, Inhibitors, Material Selection, Cathodic Protection, Protective Coatings, Splash Zone Systems, Alteration of the Environment How does NACE define the inspector's role? - ANS The inspector's role is that of a quality control technician responsible for observing and reporting conformance or deviation from the project specification. What is the inspector's responsibility when it comes to safety on the project? - ANS Safety enforcement is not the responsibility of the inspector; however, it is his/her responsibility to report any issues that may affect the project. Name some tests that may need to be conducted during surface preparation and coating operations. - ANS Temperature, Relative Humidity, Dew Point, Anchor Profile, Surface Cleanliness Name some of the documentation/reports that may be required to be maintained on a coatings project. - ANS Daily/weekly summary, material usage reports, manpower and equipment, non conformance, and conformance What are the most important characteristics of a good report? - ANS Objective, Accurate, and Detailed. What is the inspector's primary responsibility and what should the inspector not do as it pertains to the specification. - ANS The Inspector's primary responsibility as the inspector is to "enforce" specification. The inspector is NOT to make changes to the specification for any reason. What type of information could you expect to find on a Product Data Sheet? - ANS Surface preparation and application information such as recommended level of surface cleanliness, recommended application methods and equipment such as tip sizes. Also, environmental parameters for application such as max and min temperatures, curing times, recoat windows. What type of information could you expect to find on a Safety Data Sheet? - ANS Health, safety and environmental. The PPE required. Physical characteristics. Emergency responder information. Explain the difference between Quality Assurance (QA) and Quality Control (QC). - ANS Quality Assurance - Any systematic process of checking to see whether a product or service being developed is meeting specs. Quality Control - A procedure or set of procedures intended to ensure that a manufactured product or performed service adheres to a defined set of quality criteria or meets the requirements of the client or customer Identify some of the defects that can be caused by incorrect application temperatures. - ANS Failure to cure, too rapid solvent evaporation, poor film formation Describe relative humidity. - ANS The amount of moisture in the air compared to saturation level What is the dew point temperature? - ANS The temperature at which moisture will begin to form on a steel surface. Name some of the effects wind may have on a coatings project. - ANS blowing abrasives, causing excessive drift or overspray, accelerating solvent evaporation, contributing to the formation of dry spray What are some of the common errors when using an electronic hygrometer? - ANS Failure to acclimate the instrument to the environment with adequate time. Explain the process for use of the sling psychrometer. - ANS Make sure the wick is wet and clean, continue to "sling" until 3 consecutive readings are achieved List three desirable properties of a coating? - ANS Chemical Resistance, water resistance, ease of application, cohesive strength, impact resistance, dielectric strength Two broad classifications of a coating are: - ANS Organic/Inorganic, Convertible/non-convertible, thermosetting/thermoplastic What are the two primary components of a liquid applied coating? - ANS Pigment, Vehicle (Resin or Binder) What are the three methods by which a coating provides corrosion control? - ANS barrier, inhibitive, sacrificial What are the three different ways a coating can adhere to the surface? - ANS Chemical, Mechanical, Polar, or combo of all three The two broad classifications for curing mechanisms are: - ANS Convertible and Non-Convertible List two Non-convertible coating types: - ANS Chlorinated rubber, vinyl List three convertible coating curing mechanisms - ANS oxidation, co-reaction (polmerization), hydration, fusion