| Uniform | 13 | 
    
        
            | Multiform | 9 | 
    
        
            | Uniform - intergranular | 8 | 
    
        
            | Uniform - transgranular | 8 | 
    
        
            | Unspecified | 8 | 
    
        
            | Uniform - selective | 5 | 
    
        
            | Multiform - intergranular | 4 | 
    
        
            | Multiform - transgranular | 4 | 
    
        
            | Passive | 4 | 
    
        
            | Uniform - pitting | 4 | 
    
        
            | Multiform (warty - uniform) - pitting | 3 | 
    
        
            | Multiform - pitting | 3 | 
    
        
            | Internal cracking | 2 | 
    
        
            | Multiform - selective | 2 | 
    
        
            | Pitting | 2 | 
    
        
            | Other | 1 | 
    
        
            | Unknown | 1 | 
    
        
            | intergranular surface corrosion | 1 |