(1) Galvanic corrosion generated by the contact of different metal materials;
(2) Dezinc corrosion of copper alloy;
(3) Corrosion generated by the residual stress due to the heat exchange tube end expanding;
(4) Inlet corrosion caused by the turbulence of the tube end;
(5) Deposit corrosion generated by the impurity;
(6) Pitting corrosion caused by the marine pollution.
Corrosion of Expanding Point of Condenser Tube and Tube Plate
“YHYN impressed current cathodic protection system” developed by the company can control or lighten the galvanic corrosion, residual stress corrosion and the erosion corrosion or abrasion of the condenser caused by different materials. It has quite good effect on controlling the pitting and dezincification of the pipeline. It can effectively prevent or ease the corrosion of condenser.
◆ Installed in the water container board; YHMOB-3 mixed metallic oxide anode
◆ Installed in the water container; YHMOL-2225X(Φ25×210) mixed metallic oxide anode
◆ Reference electrode (different media for selection, such as high purity reference zinc electrode and silver/silver chloride reference electrode)
◆ Installed in the water container board - YH-REZ-2 high-purity zinc reference electrode (or silver/silver chloride reference electrode (or silver/silver chloride reference electrode)
◆ Installed in the water container - YH-REZ-L1 high-purity zinc reference electrode (or silver/silver chloride reference electrode)
◆ Sacrificial anode (different media; it can select the anode such as aluminium base, zinc base and magnesium base)
◆ D.C power control device, cable and equalizer
composition of YHYN condenser impressed current cathodic protection
◆ GB/T 17005-1997 Coastal Equipment Impressed Current Cathodic Protection System
◆ GB/T16166-1996 Coastal Power Plant Cooling Water System Sacrificial Anode Cathodic Protection
◆ GB3220-84 Ship Potentiostat Technical Condition
Material: water container made with the material of cast iron or carbon steel; corrosion problem of pipeline and condenser (heat exchanger) pipe board in titanium, titanium composite material, copper-nickel alloy, admiralty brass and aluminum brass.
◆ Small condenser usually applies the sacrificial anode protection technology while the large condenser uses the impressed current cathodic protection technology.
◆ It can effectively solve problems of corrosion and leaking of condenser water container, tube board and expanding point of pipeline in various materials.
◆ American West Deptford Energy Station (WDES) Combined Cycle Project (1x300mw) Condenser
◆ India Duli 1x600MW Unit Condenser
◆ Philippines Mariveles 2x300MW Unit Condenser
◆ Huaneng International Shantou Power Plant (1# and 2#) 2x300MW Unit Condenser
◆ Huaneng Liaocheng Thermal Power Co., Ltd 2x300MW and 1x135MW Coal-fired Unit Condenser
◆ Luli Group Thermal Power Co., LTD 2X50MW Unit Condenser
◆ Shandong Haihua Group Co., Ltd Power Plant 50MW Coal-fired Unit Condenser
