NACE CIP 2 Questions and Answers 100% Pass

NACE CIP 2 Questions and Answers 100% Pass Describe passivation - Answer-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 - Answer-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 - Answer-General and localized Describe galvanic corrosion - Answer-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 - Answer-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 - Answer-Impressed current and galvanic (sacrificial) impressed current power sources include: - Answer-1. Generators 2. Fuel cells 3. Wind powered cells 4. Thermoelectric cells 5. Rectified commercial power 6. Solar Cells Describe cathodic disbondment - Answer-The separation of the coating from the surface through hydroxyl formation due to increased ( made more negative ) potential. Describe dehumidification - Answer-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 - Answer-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) - Answer-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 - Answer-40% Describe two ways to reduce the relative humidity of the boundary layer - Answer- Increase the surface temperature and reduce moisture content by dehumidification Types of dehumidification equipment include - Answer-Refrigeration and desiccant Describe several benefits of dehumidification - Answer-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 - Answer-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 - Answer-USB, IR, Bluetooth Some general basic centrifugal blast set ups include - Answer-Tumbling mill, multitable, plain table, swing table, custom designed systems Centrifugal blasting conveyor systems are commonly used for cleaning - Answer-Plate, rolled structural shapes, large trusses, girders Portable centrifugal blasting systems can be used on - Answer-Ship decks, hull sides, and bottoms. Storage tanks. Concrete floors. Highways and bridge decks. Generally centrifugal blast systems are composed of the following elements - Answer- 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 - Answer- 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 - Answer-An abrasive starved wheel, a flooded or choked wheel The functions of the centrifugal blasting machine separator include - Answer-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 - Answer-Provide consistency of the finish, ensure uniform abrasive coverage, ensure conditioning of the