                                                 —       
                                                                                                                                                     G alvani  1737—1798         galvanized steel                               7—14                                              7—14                                     1. 2   0.5     150—300   500—1000                                   
                                                                                   
 
                                                                 
                                                                                                                                                  
                                             
                   AIO                               
                                                                                        
                                                                                     
                                                                                                                    
   
                                                                          mineral
                                                                           ore
                                                   taconite
                                                                   blast furnace
                                                               slag
                                                                          pig iron
                    basic oxygen pvocess
                                                                         steel
                                                        tinplate
                                                         electrochemistry
                                                       ealectrode
                                                         anode
                                                         cathode
                                                   electroplating
                                                  electrolysis
                         electrolytic refining
                                      froth flotation
                                     galv anic action
                                                 electropositivity