NACE CIP Level 1 Exam Study Guide
Questions and Answers
Corrosion - Answer-The deterioration of a material, usually a metal, that results from a reaction with its
enviroment
Passivation - Answer-a reduction of the anodic reaction rate of an electrode involved in corrosion
What are the elements of a corrosion cell? - Answer-Anode, cathode, return path, electrolyte
Describe what happens at the anode - Answer-Is that part of the metal that corrodes (dissolves in the
electrolyte). It forms positively charged ions that are conducted to the cathode. Oxidation requires a
complementary reaction at the cathode.
What is the function of the electrolyte - Answer-A chemical substance containing ions that migrate in an
electric field
What is the function of the metallic pathway - Answer-(i.e. return path) this connects the anode and
cathode allowing passage of electrons generated at the anode to the cathode
What is the galvanic series - Answer-A list of metals and alloys arranged according to their corrosion
potentials in a given environment
, The general rules of galvanic corrosion are: - Answer-(i.e. dissimilar metal) When dissimilar metals are
connected, the most active (anodic) metal corrodes more rapidly, while the more noble (cathodic) metal
is better protected and coorodes less rapidly. As the potential difference increases, the rate of galvanic
corrosion increases.
Name at least 5 factors that affect the rate of corrosion - Answer-Oxygen (lowers, lowers), temperature
(lowers, lowers), chemical salts (less, less)
humidity (wetter, more corrosion), pollutatnts/acid gases (lower, lower)
General corrosion is - Answer-distributed more or less uniformly over the surface of a material
Localized corrosion is - Answer-Occurs at discrete sites on the metal surface
List some of the common tools/methods used for corrosion control - Answer-Design - eliminate water,
edges, maintainance, inhibitors, material selection, cathodic protection systems, protective coatings,
alteration of environment
Mill scale - Answer-oxide layer formed during hot fabrication or heat treatment of metals
How does NACE define the inspector's role - Answer-quality control technician who is primarily
responsible for observing and reporting the technical aspects of a coating project and its
conformance/deviation from the spec (not supervision)
What is the inspector's responsibility when it comes to safety on a project - Answer-report any issues
that may affect the project (safety enforcement is not the responsibility of the inspector)
Name some tests that may need to be conducted during surface preparation and coating operations -
Answer-Humidity, dew point, surface tempt, invisible contaminants, blast hose/nozzle, surface profile,
level of cleanliness, viscosity
Questions and Answers
Corrosion - Answer-The deterioration of a material, usually a metal, that results from a reaction with its
enviroment
Passivation - Answer-a reduction of the anodic reaction rate of an electrode involved in corrosion
What are the elements of a corrosion cell? - Answer-Anode, cathode, return path, electrolyte
Describe what happens at the anode - Answer-Is that part of the metal that corrodes (dissolves in the
electrolyte). It forms positively charged ions that are conducted to the cathode. Oxidation requires a
complementary reaction at the cathode.
What is the function of the electrolyte - Answer-A chemical substance containing ions that migrate in an
electric field
What is the function of the metallic pathway - Answer-(i.e. return path) this connects the anode and
cathode allowing passage of electrons generated at the anode to the cathode
What is the galvanic series - Answer-A list of metals and alloys arranged according to their corrosion
potentials in a given environment
, The general rules of galvanic corrosion are: - Answer-(i.e. dissimilar metal) When dissimilar metals are
connected, the most active (anodic) metal corrodes more rapidly, while the more noble (cathodic) metal
is better protected and coorodes less rapidly. As the potential difference increases, the rate of galvanic
corrosion increases.
Name at least 5 factors that affect the rate of corrosion - Answer-Oxygen (lowers, lowers), temperature
(lowers, lowers), chemical salts (less, less)
humidity (wetter, more corrosion), pollutatnts/acid gases (lower, lower)
General corrosion is - Answer-distributed more or less uniformly over the surface of a material
Localized corrosion is - Answer-Occurs at discrete sites on the metal surface
List some of the common tools/methods used for corrosion control - Answer-Design - eliminate water,
edges, maintainance, inhibitors, material selection, cathodic protection systems, protective coatings,
alteration of environment
Mill scale - Answer-oxide layer formed during hot fabrication or heat treatment of metals
How does NACE define the inspector's role - Answer-quality control technician who is primarily
responsible for observing and reporting the technical aspects of a coating project and its
conformance/deviation from the spec (not supervision)
What is the inspector's responsibility when it comes to safety on a project - Answer-report any issues
that may affect the project (safety enforcement is not the responsibility of the inspector)
Name some tests that may need to be conducted during surface preparation and coating operations -
Answer-Humidity, dew point, surface tempt, invisible contaminants, blast hose/nozzle, surface profile,
level of cleanliness, viscosity
