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Atmospheric Corrosion of Bicycle. Where and When Photo was taken in December 2012 in Jubail City Bicycle was left for years outside What Could H ave Happened This looks an example of paint failure due to severe atmospheric corrosion
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Where and When • Photo was taken in December 2012 in Jubail City • Bicycle was left for years outside • What Could Have Happened • This looks an example of paint failure due to severe atmospheric corrosion • Hot, humid atmosphere of Jubail city contains several pollutants like CO2 and SO2 • Proximity of the sea added the salt and humidity • The bicycle is apparently painted by wet paint coats which is prone to defects • The paint failure might have initiated by paint defects • The paint failed via paint disbondment which allowed the corrosive environment’s access to metal\ • After the paint had gone normal atmospheric corrosion started which is evident from the presence of rust on the frame • Careful inspection of the chrome-finish handle shows initiation of pitting. This is an effect of chloride ions present in the atmosphere. These ions have damaged the passive film on the chromium and initiated pitting • What Could Have Been Done • The bicycle should have been parked inside so that air-water did not condense on it • Painting system could have been improved. Automobiles have better paint system. Alternatively the surface cud have been covered by powder coating
