The deterioration of a substance, usually a metal from a
Define Corrosion
reaction with its environment
A layer of oxides formed on the surface of a metal that
What is Passivation?
provides corrosion protection.
What is an example of Stainless Steel
passivation?
What are the elements of a Anode, Cathode, Metallic Pathway, Electrolyte
corrosion cell?
Describe what happens at The metal dissolves into the electrolyte
the anode.
What is the function of the Allows the passage of ions to connect the corrosion cell
electrolyte?
What is the function of the Allows the flow of electrons to connect the corrosion
metallic pathway? cell
A listing of metals in order of reactivity (more or less
What is the galvanic series?
noble) in seawater at 25 C
The general rules of The more reactive metal --when connected to the less
galvanic corrosion are: reactive (more noble) metal -- will corrode preferentially
Name the five (5) most Humidity, oxygen, chemical salts, pollutants, temperature
important factors that affect
the rate of corrosion.
Results in a relatively uniform loss of material over the
entire surface, Results in a general thinning of the
General corrosion is:
affected surface, Relatively easy to inspect, Does not
casue catastrophic failures
, At discrete/specific spots on the metal surface. Typically
pitting and crevice corrosion. The most concerning as
Localized corrosion is:
damage is concentrated and loss of integrity or
structural failure can result.
List some of the common Design, Inhibitors, Material Selection, Cathodic
tools/methods used for Protection, Protective Coatings, Splash Zone Systems,
corrosion control. Alteration of the Environment
The inspector's role is that of a quality control
How does NACE define the technician responsible for observing and reporting
Inspector's role? conformance or deviation from the project
specification.
What is the inspector's Safety enforcement is not the responsibility of the
responsibility when it comes inspector; however, it is his/her responsibility to report
to safety on the project? any issues that may affect the project.
Name some tests that may Ambient Temperature, Relative Humidity & Dew Point,
need to be conducted Anchor Profile, Surface Cleanliness
during surface preparation
and coating operations.
Name some of the Daily/weekly summary, material usage reports,
documentation/reports that manpower and equipment, conformance, and Non-
may be required to be conformance
maintained on a coatings
project.
What are the most Objective, Accurate, and Detailed.
important characteristics of
a good report?
What is the inspector's The Inspector's primary responsibility as the inspector is
primary responsibility and to "enforce" specification. The inspector is NOT to make
what should the inspector changes to the specification for any reason.
not do as it pertains to the
specification.
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