NACE CIP 2 EXAM Questions With Questions and
Verified Answers Latest Updated 2023/2024 Graded A+
Describe passivation
Passivation is the formation of a protective oxide Film on the surface reducing its
chemical activity and its ability to corrode
Describe the following factors and how they affect corrosion
Oxygen: oxygen increases the rate of corrosion temperature
Temperature: corrosion usually accelerated with increasing temperature
Chemical salts: increase the rate of corrosion by increasing the efficiency of the
electrolyte
humidity: the wetter the environment, the more corrosion is likely to occur pollutants and
acid gases: all promote corrosion
Two broad categories of corrosion can be described as
General and localized
Describe galvanic corrosion
Galvanic corrosion is an electrochemical action of two dissimilar metals in the presence
of an electrolyte and an electron conductive path, Which occurs when the dissimilar
metals come into contact
Describe cathodic protection
Cathodic protection is the reduction or elimination of corrosion by making the structure
to be protected a cathode by means of impressed current or attachment to a galvanic
anode
The two primary types of cathodic protection are
Impressed current and galvanic (sacrificial)
impressed current power sources include:
1. Generators 2. Fuel cells 3. Wind powered cells 4. Thermoelectric cells 5. Rectified
commercial power 6. Solar Cells
Describe cathodic disbondment
The separation of the coating from the surface through hydroxyl formation due to
increased ( made more negative ) potential.
Describe dehumidification
Dehumidification is the process of removing moisture vapor from the air to lower its dew
point
When planning enclosures the following minimum requirements should be
considered
Must be large enough to contain the whole work area.
Not be larger than the performance capabilities of the dehumidification equipment.
Be sturdy enough to hold up to intended work activities, potential loads, and a possible
inclement weather.
Have minimal leakage to maintain proper environmental conditions and ensure the
dehumidification system operates efficiently.
Describe air turns (air changes)
, The air turnover principal illuminates air stratification, or layering, in large open spaces
by recirculating the hot air that becomes trapped in the higher spaces.
The number of times it does this per hour is called air turns.
At & below what relative humidity does corrosion virtually cease
40%
Describe two ways to reduce the relative humidity of the boundary layer
Increase the surface temperature and reduce moisture content by dehumidification
Types of dehumidification equipment include
Refrigeration and desiccant
Describe several benefits of dehumidification
Dries the air. Lowers the dew point. Permits blasting the entire surface. Holds the blast
with dry air. Helps in cleaning the surface. Holds the surface during coating application.
Electronic hygrometers can be used to determine
Relative humidity, air temperature, and dewpoint temperature.
Advanced environmental testing instruments have the ability to store data that
can be transferred to a computer and other devices. Transfer methods include
USB, IR, Bluetooth
Some general basic centrifugal blast set ups include
Tumbling mill, multitable, plain table, swing table, custom designed systems
Centrifugal blasting conveyor systems are commonly used for cleaning
Plate, rolled structural shapes, large trusses, girders
Portable centrifugal blasting systems can be used on
Ship decks, hull sides, and bottoms. Storage tanks. Concrete floors. Highways and
bridge decks.
Generally centrifugal blast systems are composed of the following elements
Centrifugal abrasive throwing wheel, the blast cabinet, in fixed systems some type of
material handling system, abrasive recycling system, a dust collector and vent pipe
system, abrasives.
The efficiency of the centrifugal blast wheels depends on several factors
Abrasive operating mix, size of the abrasive, velocity of the abrasive coming off the
wheel, quantity and direction of the thrown abrasive, condition of the feed parts.
Little amperage readings on a centrifugal blasting machine could signify
An abrasive starved wheel, a flooded or choked wheel
The functions of the centrifugal blasting machine separator include
To control the sizing of the abrasive mix, to remove sand, spent abrasives, rust, dirt,
and any other contaminants from the abrasive stream, to control abrasive consumption
A well balanced operating mix (working mix) of abrasives will
Provide consistency of the finish, ensure uniform abrasive coverage, ensure
conditioning of the abrasive for optimum cleaning, minimize lowest abrasive and
machine part where and reduce downtime for maintenance
Some of the inspection concerns during centrifugal blasting include
Monitor the dust collector, monitor the amperage of the wheel motors / low amperage,
Monitor the handling in the loading of the conveyor line for contaminants and possible
discontinuities in the steel, monitor the speed of wine, inspect the steel as it leaves the
production line
Verified Answers Latest Updated 2023/2024 Graded A+
Describe passivation
Passivation is the formation of a protective oxide Film on the surface reducing its
chemical activity and its ability to corrode
Describe the following factors and how they affect corrosion
Oxygen: oxygen increases the rate of corrosion temperature
Temperature: corrosion usually accelerated with increasing temperature
Chemical salts: increase the rate of corrosion by increasing the efficiency of the
electrolyte
humidity: the wetter the environment, the more corrosion is likely to occur pollutants and
acid gases: all promote corrosion
Two broad categories of corrosion can be described as
General and localized
Describe galvanic corrosion
Galvanic corrosion is an electrochemical action of two dissimilar metals in the presence
of an electrolyte and an electron conductive path, Which occurs when the dissimilar
metals come into contact
Describe cathodic protection
Cathodic protection is the reduction or elimination of corrosion by making the structure
to be protected a cathode by means of impressed current or attachment to a galvanic
anode
The two primary types of cathodic protection are
Impressed current and galvanic (sacrificial)
impressed current power sources include:
1. Generators 2. Fuel cells 3. Wind powered cells 4. Thermoelectric cells 5. Rectified
commercial power 6. Solar Cells
Describe cathodic disbondment
The separation of the coating from the surface through hydroxyl formation due to
increased ( made more negative ) potential.
Describe dehumidification
Dehumidification is the process of removing moisture vapor from the air to lower its dew
point
When planning enclosures the following minimum requirements should be
considered
Must be large enough to contain the whole work area.
Not be larger than the performance capabilities of the dehumidification equipment.
Be sturdy enough to hold up to intended work activities, potential loads, and a possible
inclement weather.
Have minimal leakage to maintain proper environmental conditions and ensure the
dehumidification system operates efficiently.
Describe air turns (air changes)
, The air turnover principal illuminates air stratification, or layering, in large open spaces
by recirculating the hot air that becomes trapped in the higher spaces.
The number of times it does this per hour is called air turns.
At & below what relative humidity does corrosion virtually cease
40%
Describe two ways to reduce the relative humidity of the boundary layer
Increase the surface temperature and reduce moisture content by dehumidification
Types of dehumidification equipment include
Refrigeration and desiccant
Describe several benefits of dehumidification
Dries the air. Lowers the dew point. Permits blasting the entire surface. Holds the blast
with dry air. Helps in cleaning the surface. Holds the surface during coating application.
Electronic hygrometers can be used to determine
Relative humidity, air temperature, and dewpoint temperature.
Advanced environmental testing instruments have the ability to store data that
can be transferred to a computer and other devices. Transfer methods include
USB, IR, Bluetooth
Some general basic centrifugal blast set ups include
Tumbling mill, multitable, plain table, swing table, custom designed systems
Centrifugal blasting conveyor systems are commonly used for cleaning
Plate, rolled structural shapes, large trusses, girders
Portable centrifugal blasting systems can be used on
Ship decks, hull sides, and bottoms. Storage tanks. Concrete floors. Highways and
bridge decks.
Generally centrifugal blast systems are composed of the following elements
Centrifugal abrasive throwing wheel, the blast cabinet, in fixed systems some type of
material handling system, abrasive recycling system, a dust collector and vent pipe
system, abrasives.
The efficiency of the centrifugal blast wheels depends on several factors
Abrasive operating mix, size of the abrasive, velocity of the abrasive coming off the
wheel, quantity and direction of the thrown abrasive, condition of the feed parts.
Little amperage readings on a centrifugal blasting machine could signify
An abrasive starved wheel, a flooded or choked wheel
The functions of the centrifugal blasting machine separator include
To control the sizing of the abrasive mix, to remove sand, spent abrasives, rust, dirt,
and any other contaminants from the abrasive stream, to control abrasive consumption
A well balanced operating mix (working mix) of abrasives will
Provide consistency of the finish, ensure uniform abrasive coverage, ensure
conditioning of the abrasive for optimum cleaning, minimize lowest abrasive and
machine part where and reduce downtime for maintenance
Some of the inspection concerns during centrifugal blasting include
Monitor the dust collector, monitor the amperage of the wheel motors / low amperage,
Monitor the handling in the loading of the conveyor line for contaminants and possible
discontinuities in the steel, monitor the speed of wine, inspect the steel as it leaves the
production line
