we had done deepest efforts to remove rusting or corrosion free world by removing free soluble salts from ferrous materials sulphate ,nitrates and chlorides are main causes of corrosion we had worked on it and we fought battle against corrosion or rust we conquered no rust saving the economy if old material it will be work upto decades and decades we tried to immortalism to reach new heights all trains ships petroleum industry air transportation dams brides building or mechanical and civil fields and archaeological monuments ................etc our last coming generation will see all wonders of world intact after our touch any discussion query is appreciated regards good to all countries people ,regards harish sharma (india)