nd钢管：09CrCuSb（企业代号ND钢）耐硫酸低温露点腐蚀用钢（ND钢板，ND钢管，09CrCuSb钢板，09CrCuSb钢管等）。 09CrCuSb（ND钢管）钢是以燃煤锅炉，燃油锅炉；电炉的热交换、烟管、烟囱,锅炉空气预热器，省煤气，换热器，冷凝冷却器，蒸发器等用途为目的开发的具有优秀的耐硫酸露点腐蚀的热轧钢板、钢管。其优越的耐硫酸露点腐蚀的性能及非常高的性价比，是完全可以代替不锈钢，超越不锈钢（在耐硫酸露点腐蚀方面）的最好材料，ND钢具有重大经济意义，符合当今高效.长寿.节能.环保等“绿色”观念和国家发展政策导向。ND钢 即09CrCuSb 钢是目前国内外最理想的“耐硫酸低温露点腐蚀”用钢材，ND钢广泛用于制造在高含硫烟气中服役的省煤器，空气预热器，热交换器和蒸发器等装置设备，用于抵御含硫烟气结露点腐蚀。ND钢还具有耐氯离子腐蚀的能力。ND钢管主要的参考指标（70摄氏度50%H2SO4溶液中浸泡24小时），与碳钢，日本进口同类钢，不锈钢耐腐蚀性能相比，要高于这些钢种。产品经国内各大炼油厂和制造单位使用后受到广泛好评，钢中碳含量较低，并获得良好的使用效果。

ND steel pipe: 09CrCuSb (enterprise code ND steel) low temperature sulfuric acid dew point corrosion resistant steel (ND steel plate, ND steel pipe, 09CrCuSb steel plate, 09CrCuSb steel pipe, etc.). 09CrCuSb (ND steel) is a hot-rolled steel plate and steel pipe with excellent sulfuric acid dew point corrosion resistance, developed for the purpose of coal-fired boiler, oil-fired boiler, electric furnace heat exchange, flue gas pipe, chimney, boiler air preheater, gas-saving, heat exchanger, condensation cooler, evaporator, etc. Its superior sulfuric acid dew point corrosion resistance and very high cost performance are the best materials that can completely replace stainless steel and surpass stainless steel (in sulfuric acid dew point corrosion resistance). ND steel is of great economic significance, which is in line with the current "green" concept of high efficiency, long life, energy saving and environmental protection and the guidance of National Development policy. ND steel, 09CrCuSb steel, is the most ideal steel for "low temperature dew point corrosion resistance of sulfuric acid" 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, and to resist dew point corrosion of sulfur-containing flue gas. 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. The products have been widely praised by major refineries and manufacturing units in China. The carbon content in steel is low, and good results have been obtained.

具体数据见下表：

The specific data are shown in the table below.

ND钢腐蚀率比较，mg/c㎡.h(70℃50%H2SO4)

Comparing the corrosion rate of ND steel, mg/c. h (70 C 50% H2SO4)

钢种 ND CRIR(日本） 1Cr18Ni9 Corten 20G

Steel ND CRIR (Japan) 1Cr18Ni9 Corten 20G

腐蚀速率 7.30 13.40 21.70 63.00 103.50

Corrosion rate 7.30 13.40 21.70 63.00 103.50

广泛应用于电厂和炼油厂制造在高含硫烟气中工作的省煤器、空 气预热器、热交换器和蒸发器等用以抵御含硫烟气结露腐蚀。

It is widely used in power plants and refineries to manufacture economizers, air preheaters, heat exchangers and evaporators working in high sulphur-containing flue gas to resist condensation corrosion of sulphur-containing flue gas.