ND鋼管即09CrCuSb 鋼是目前國內(nèi)外理想的“耐硫酸低溫露點(diǎn)腐蝕”用鋼材（ND鋼板，ND鋼管，09CrCuSb鋼板，09CrCuSb鋼管等），ND鋼管廣泛用于制造在高含硫煙氣中服役的省煤器，空氣預(yù)熱器，熱交換器和蒸發(fā)器等裝置設(shè)備，用于抵御含硫煙氣結(jié)露點(diǎn)腐蝕。nd鋼管還具有耐氯離子腐蝕的能力。nd鋼管主要的參考指標(biāo)（70攝氏度50%H2SO4溶液中浸泡24小時(shí)），與碳鋼，日本進(jìn)口同類鋼，不銹鋼耐腐蝕性能相比，要高于這些鋼種。nd鋼管產(chǎn)品經(jīng)國內(nèi)各大煉油廠和制造單位使用后受到廣泛好評，并獲得良好的使用效果。具體數(shù)據(jù)見下表:ND鋼管腐蝕率比較，mg/c㎡.h(70℃50%H2SO4)鋼種 ND CRIR(日本） 1Cr18Ni9 Corten 20G。

ND steel pipes, namely 09CrCuSb steel, are ideal low temperature sulfuric acid dew point corrosion resistant steels (ND steel plate, ND steel pipe, 09CrCuSb steel plate, 09CrCuSb steel pipe, etc.) at home and abroad. ND steel is widely used to manufacture economizers, air preheaters, heat exchangers and evaporators serving in high sulfur-containing flue gas, which are used to resist sulfur-containing dew point corrosion. ND steel also has resistance to chloride ion corrosion. The main reference index of ND steel pipe (soaking in 50% H2SO4 solution at 70 degrees Celsius for 24 hours) is higher than that of carbon steel, similar steel imported from Japan and stainless steel. After being used by major refineries and manufacturing units in China, the products have been widely praised and achieved good results. Specific data can be found in the following table: comparison of corrosion rate of ND steel, mg/c. h (70 C 50% H2SO4) steel ND CRIR (Japan) 1Cr18Ni9 Corten 20G.