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366   C h a p t e r   9                              A t m o s p h e r i c   C o r r o s i o n    367












                                          Delhi





                                                                Calcutta


                         Mumbai
                                           Hyderabad

                                                             Extremely severe
                                     Bangalore               Severe
                                                             Moderate
                                                             Mild
                                                             Negligible

                      FIGURE 9.38  Corrosivity map of India.


























                      FIGURE 9.39  Atmospheric test rack exposed to marine West Coast
                      environments. (Courtesy Defence R&D Canada-Atlantic)
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