When X70 steel formed a macrocell between inoculation SRB or bactericide clay and sand,X70 steel in clay was an anode,while that in sand was a cathode.

• 接菌土壤宏电池的电流和电动势比灭菌的大；接菌及灭菌粘土中阳极的腐蚀速率分别是自然腐蚀速率的4.；93和2