Harm of Jarosite Alteration Zone to Hydraulic Structure and Its Handle

The Jarosite alteration zone is product of the weathering pyrite.During weathering,pyrite produce a lot of sulphonic acid,the acid can not only corrode concrete,but also corrode metal structure seriously.It only takes six months to break a reinforced concrete 60 cm thick,when biuld directly the concret of power hole shaft on the pyrite ore vein.It is first case in hydraulic structure in the world.