NACE CP2 EXAM LATEST UPDATED GRADED A+

NACE CP2 EXAM LATEST UPDATED GRADED A+ Describe passivation - ANSPassivation 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 - ANSOxygen: 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 - ANSGeneral and localized Describe galvanic corrosion - ANSGalvanic 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 - ANSCathodic 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 - ANSImpresse