SOLUTIONS GUARANTEE A+
✔✔Solvent is: - ✔✔Liquid that dissolves solid resins
✔✔Pigments are? - ✔✔Hides substrate,provides decorative color, enhances desired
properties
✔✔Additive are: - ✔✔Special purpose ingredients used to enhance the performance
✔✔Vehicle is ? - ✔✔Liquid portion of the coating .
✔✔Electrolytes are: - ✔✔Can be any solution capable of conducting electricity
✔✔Anode is ? - ✔✔The area of the metal surface that corrodes.
✔✔Metallic Pathway does what ? - ✔✔Allows the passage of electrons between the
anode and cathode
✔✔The cathode is: - ✔✔Area of the metal surface that does not corrode .
✔✔Define corrosion - ✔✔The deterioration of a substance, usually a mental from a
reaction with its environment
✔✔What is passivation - ✔✔A layer of oxides formed on the surface of a metal that
provides correction protection, stainless steel for examples
✔✔What are the elements of a corrosion cells - ✔✔Anode, cathode, metallic Pathway,
Electrolyte
✔✔Describe what happens at the anode - ✔✔The metal dissolves into the electrolyte
✔✔No one coating can contain every beneficial property
List three coating properties that might be a priority for the underwater support system
of this offshore rig - ✔✔Water resistance
Weatherproofing
Marine fouling
✔✔What is 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 galvanic series? - ✔✔A listing of metals in order of reactivity (more or less
noble)
✔✔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
✔✔Localized 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.
✔✔5 most important factors that affects corrosion rate: - ✔✔Humidity
Oxygen
Pollutants
Temperature
Chemical Salts
✔✔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 failures
✔✔Two broad classification of a coating are: - ✔✔Organic Convertible Thermosetting
Inorganic Non-Convertible Thermoplastic
✔✔Two primary components of a liquid applied coating ? - ✔✔Pigment & Vehicle
✔✔What is the primary role of the inspector? - ✔✔Specification compliance.
✔✔High humidity in the air during coating application can cause which of the following: -
✔✔Solvent entrapment
✔✔RH% should be below what level for coatings operations to continue ? - ✔✔85%
✔✔The dew point is ? - ✔✔Temperature at which atmospheric air becomes saturated
with water.
✔✔Relative Humidity (RH) is : - ✔✔A measure of the amount of water vapor in the air
compared to the maximum amount it could hold .
✔✔A surface lamination should be removed by______since no coating systems can
effectively protect the surface if left intact. - ✔✔Grinding
✔✔How should rough welds be treated? - ✔✔Ground smooth(if approved)
✔✔Mill scale represents: - ✔✔Cathode