Abstract: Tube and tube sheet joints have a decisive influence on the corrosion resistance of air coolers.The nickel base alloy was deposited on the surface of low alloy steel tube plate,and the tube is made of nickel base alloy.The cost of equipment is greatly reduced under the premise that the air cooler has excellent corrosion resistance.In order to meet the requirement of corrosion resistance for high pressure air coolers in hydrogenation plant,strip cladding of nickel base alloy was carried out on the surface of Q345R（HIC）low alloy steel tube plate to improve the corrosion resistance.Meanwhile,welding procedure qualification was carried out to obtain the best strip cladding parameters,and the product was manufactured.