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1、Sulphuric acid,对冷却水中氯离子的耐腐蚀曲线,10,102,103,104,105,0,50,100,TemperatureC,Nocorrosion,316,C-276,254 SMO,Crevicecorrosion,D-205,pH=min 7.0,ppm chlorides,Sulphuric acid,Typical Composition of Metals for Use in Heat Exchangers in H2SO4 Processing,N 0.2WW 3,Fe 2-6W 2.5,Fe 18-21Si 5,Fe 6Si max.0.08,AISI 316
2、Avesta 254 SMOAlloy C-276Hastelloy C-22Hastelloy G-30Hastelloy D-205Hastelloy C-2000,17.020.015.521.029.520.023.0,12.018.058.044.040.064.559.0,2.06.116.013.55.02.516.0,0.71.72.01.6,Others,Cr,Nickel,Mo,Cu,Composition,Sulphuric acid,Iso-corrosion diagram 0.1 mm/year,Diabon,HastelloyD-205,254 SMO,Haste
3、lloyC-276,Alloy G-30,AISI 316,AISI 316,150,100,50,0,C,150,100,50,0,C,硫酸中常用材料的耐腐蚀曲线图,Sulphuric acid,硫酸板式换热器使用材料：稀酸：镍合金SMO254:浓度10以下，温度75以下，Cl根3000ppm 氟离子 1000ppm以下;浓酸：哈氏合金C276：浓度93以上，温度90以下密封垫片：稀酸三元乙丙橡胶EPCM，浓酸氟橡胶FKMG，半焊接式换 热器板片密封可不用氟橡胶铜电解液换热器使用材料：在介质浓度不变的条件下，影响腐蚀的二大因素是温度和接口流速；硫酸下使用的材料：SMO254和哈市合金G30（
4、比C276耐Cl根和氟根优越）Ti：在硫酸铜介质中，可到105接口流速对板片腐蚀的影响：通常金属表面形成的氧化膜抵抗介质的腐蚀，大多数氧化膜对流速是敏感的；板式换热器中，通道流速，分流区和接口流速中，接口流速最快，当电解液循环流量超过设计流量时，接口流速增加,Sulphuric acid,Plate-main components,Thin sheet design,cold formed in single step hydraulic pressing(up to 40000 tons),Main heat transferarea,Distribution area,Suspension,Inlet/outlet,Passing through,Gasket in gasket groove,Leak chamber,Sulphuric acid,Unique 5-point alignment systemProvides exact positioning of the plates horizontally and verticallyEnsures good sealing throughout the plate pack,Carrying bar,Guiding bar,Plate,Frame-M15 and larger,
