NACE CIP Level 2 UPDATED Exam
Questions and CORRECT Answers
passivation - CORRECT ANSWER - formation of thin surface layer on metals(oxide,
carbonate) that slows the rate of corrosion process
two categories of corrosion - CORRECT ANSWER - general and localized
oxygen effect on corrosion - CORRECT ANSWER - electrolytes w/ different oxygen
levels create anodic and cathodic areas of the metal
temperature effect on corrosion - CORRECT ANSWER - higher temperature results in a
greater rate of corrosion
chemical salts effect on corrosion - CORRECT ANSWER - increase efficiency of
electrolye and therefore also the corrosion rate
humidity effect on corrosion - CORRECT ANSWER - higher ____ results in higher
corrosion(usually maxed at 85%)
4 parts of galvanic corrosion - CORRECT ANSWER - anode, cathode, metallic path,
electrolyte
cathodic protection - CORRECT ANSWER - whole surface is made cathodic with a direct
current applied along with a separate anode
crevice corrosion - CORRECT ANSWER - A form of corrosion that occurs within narrow
crevices and under deposits of dirt or corrosion products (i.e., in regions of localized depletion of
oxygen in the solution).
, Pitting Corrosion - CORRECT ANSWER - Localized corrosion of a metal surface that is
confined to a small area and takes the form of cavities called pits.
galvanic corrosion - CORRECT ANSWER - is an electrochemical reaction of two
disimilar metals in the presence of an electroluye and an electron conductive path, which occurs
when dissimilar metals come into contact
two typs of cathodic protection - CORRECT ANSWER - galvanic and impressed current
galvanic system - CORRECT ANSWER - galvanic anode attached to structure
-suitbale materials include aluminum, magnesium and zinc
impressed current system - CORRECT ANSWER - an external power source is connected
or impressed between the structure to be protected and the ground bed
-examples of materials include scrap steel, graphite, iron oxide, hihg silicon chromium bearing
cast iron, mixed metal oxide titanium
cathodic disbondment - CORRECT ANSWER - separation of the coating from the surface
through OH- ions formation due to increased(i.e made more negative) potential
sequence of cathodic disbondment - CORRECT ANSWER - 1)stable cathodic protection
2) disbondment by hydroxyl ions 3) disbondent by hydrogen ions
principal component of mild carbon steel - CORRECT ANSWER - Iron
anode - CORRECT ANSWER - part of corrosion cell where metal dissolves
most common use for impressed current - CORRECT ANSWER - pipelines
Questions and CORRECT Answers
passivation - CORRECT ANSWER - formation of thin surface layer on metals(oxide,
carbonate) that slows the rate of corrosion process
two categories of corrosion - CORRECT ANSWER - general and localized
oxygen effect on corrosion - CORRECT ANSWER - electrolytes w/ different oxygen
levels create anodic and cathodic areas of the metal
temperature effect on corrosion - CORRECT ANSWER - higher temperature results in a
greater rate of corrosion
chemical salts effect on corrosion - CORRECT ANSWER - increase efficiency of
electrolye and therefore also the corrosion rate
humidity effect on corrosion - CORRECT ANSWER - higher ____ results in higher
corrosion(usually maxed at 85%)
4 parts of galvanic corrosion - CORRECT ANSWER - anode, cathode, metallic path,
electrolyte
cathodic protection - CORRECT ANSWER - whole surface is made cathodic with a direct
current applied along with a separate anode
crevice corrosion - CORRECT ANSWER - A form of corrosion that occurs within narrow
crevices and under deposits of dirt or corrosion products (i.e., in regions of localized depletion of
oxygen in the solution).
, Pitting Corrosion - CORRECT ANSWER - Localized corrosion of a metal surface that is
confined to a small area and takes the form of cavities called pits.
galvanic corrosion - CORRECT ANSWER - is an electrochemical reaction of two
disimilar metals in the presence of an electroluye and an electron conductive path, which occurs
when dissimilar metals come into contact
two typs of cathodic protection - CORRECT ANSWER - galvanic and impressed current
galvanic system - CORRECT ANSWER - galvanic anode attached to structure
-suitbale materials include aluminum, magnesium and zinc
impressed current system - CORRECT ANSWER - an external power source is connected
or impressed between the structure to be protected and the ground bed
-examples of materials include scrap steel, graphite, iron oxide, hihg silicon chromium bearing
cast iron, mixed metal oxide titanium
cathodic disbondment - CORRECT ANSWER - separation of the coating from the surface
through OH- ions formation due to increased(i.e made more negative) potential
sequence of cathodic disbondment - CORRECT ANSWER - 1)stable cathodic protection
2) disbondment by hydroxyl ions 3) disbondent by hydrogen ions
principal component of mild carbon steel - CORRECT ANSWER - Iron
anode - CORRECT ANSWER - part of corrosion cell where metal dissolves
most common use for impressed current - CORRECT ANSWER - pipelines
