Define Corrosion - ANSWER The deterioration of a substance, usually a metal from a re-
action with its environment
What is passivation? - ANSWER A layer of oxides formed on the surface of a metal that
provides corrosion protection.
What is an example of passivation? - ANSWER Stainless Steel
What are the elements of a corrosion cell? - ANSWER Anode, Cathode, Metallic Pathway,
Electrolyte
Describe what happens at the anode. - ANSWER The metal dissolves into the electrolyte
What is the function of the electrolyte? - ANSWER Allows the passage of ions to connect
the corrosion cell
What is the function of the metallic pathway? - ANSWER Allows the flow of electrons to
connect the corrosion cell
What is the galvanic series? - ANSWER A listing of metals in order of reactivity (more or
less noble) in seawater at 25 C
The general rules of galvanic corrosion are: - ANSWER The less noble (or more reactive)
metal when connected to a more noble (or less reactive metal) will corrode preferentially
1
, Name the five most important factors that affect the rate of corrosion. - ANSWER Humid-
ity, oxygen, chemical salts, pollutants, temperature
General corrosion is: - ANSWER Results in a relatively uniform loss of material over the
entire surface, Results in a general thinning of the affected surface, Relatively easy to in-
spect, Does not casue catastrophic failures
Localized corrosion is: - ANSWER Typically pitting and crevice corrosion. It is typically of
the most concern as damage is concentrated and loss of integrity or structural failure can re-
sult.
List some of the common tools/methods used for corrosion control. - ANSWER Design,
Inhibitors, Material Selection, Cathodic Protection, Protective Coatings, Splash Zone Systems,
Alteration of the Environment
How does NACE define the inspector's role? - ANSWER 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? - ANSWER
Safety enforcement is not the responsibility of the inspector; however, it is his/her responsi-
bility to report any issues that may affect the project.
Name some tests that may need to be conducted during surface preparation and coating op-
erations. - ANSWER Temperature, Relative Humidity, Dew Point, Anchor Profile, Surface
Cleanliness
Name some of the documentation/reports that may be required to be maintained on a coat-
ings project. - ANSWER Daily/weekly summary, material usage reports, manpower and
equipment, non conformance, and conformance
2
action with its environment
What is passivation? - ANSWER A layer of oxides formed on the surface of a metal that
provides corrosion protection.
What is an example of passivation? - ANSWER Stainless Steel
What are the elements of a corrosion cell? - ANSWER Anode, Cathode, Metallic Pathway,
Electrolyte
Describe what happens at the anode. - ANSWER The metal dissolves into the electrolyte
What is the function of the electrolyte? - ANSWER Allows the passage of ions to connect
the corrosion cell
What is the function of the metallic pathway? - ANSWER Allows the flow of electrons to
connect the corrosion cell
What is the galvanic series? - ANSWER A listing of metals in order of reactivity (more or
less noble) in seawater at 25 C
The general rules of galvanic corrosion are: - ANSWER The less noble (or more reactive)
metal when connected to a more noble (or less reactive metal) will corrode preferentially
1
, Name the five most important factors that affect the rate of corrosion. - ANSWER Humid-
ity, oxygen, chemical salts, pollutants, temperature
General corrosion is: - ANSWER Results in a relatively uniform loss of material over the
entire surface, Results in a general thinning of the affected surface, Relatively easy to in-
spect, Does not casue catastrophic failures
Localized corrosion is: - ANSWER Typically pitting and crevice corrosion. It is typically of
the most concern as damage is concentrated and loss of integrity or structural failure can re-
sult.
List some of the common tools/methods used for corrosion control. - ANSWER Design,
Inhibitors, Material Selection, Cathodic Protection, Protective Coatings, Splash Zone Systems,
Alteration of the Environment
How does NACE define the inspector's role? - ANSWER 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? - ANSWER
Safety enforcement is not the responsibility of the inspector; however, it is his/her responsi-
bility to report any issues that may affect the project.
Name some tests that may need to be conducted during surface preparation and coating op-
erations. - ANSWER Temperature, Relative Humidity, Dew Point, Anchor Profile, Surface
Cleanliness
Name some of the documentation/reports that may be required to be maintained on a coat-
ings project. - ANSWER Daily/weekly summary, material usage reports, manpower and
equipment, non conformance, and conformance
2
