Action of Coal on Metal Corrosion in Coal Mines

Electrochemical corrosion behavior of metals under a variety of coal condition bas been studied in this paper. The corrosion dynamics and electrochemical parameters of metals have heen measured and the micrograph of metals corrosion has been analyzed. The results show that in the neutral electricity medium solution the metal corrosion rate varies greatly when metals contacted with different kinds of coal. The coal exerts an important action on corrosion of metal contacting with coal.In this case the deciding factors of this action are the coalification of coal and the relative electrode potential of metal. The effect of higher coalification coal with higher electroconductivity such as anthracite coal is vary noteworthy while the low coalification coal with low or without any electrocondutivity such as brown coal and coking coal produces little influence.