苏203区块于2011年开发，目前面临重大腐蚀问题，严重影响气田的正常开采和运行。寻找一种适用于苏203井区生产工况的防腐蚀措施势在必行。对苏203井区的腐蚀情况进行了调研，并对高性能合金镀层进行了室内及现场应用评价。结果表明：苏203井区腐蚀情况严重，最高腐蚀速率达2.3 mm/a，且出现穿孔的现象。高性能合金镀层具有良好的硬度、耐磨性和耐蚀性，能够明显降低试样的腐蚀速率，平均腐蚀速率为未镀层试样的3.84%~4.54%。将苏南19站站内转水管线更换为高性能合金镀层管线后，未发现壁厚明显变薄的现象，这表明高性能合金镀层具有良好的耐蚀性，可在苏203井区推广使用。

Su 203 block was developed in 2011. At present, it faced major corrosion problems, which seriously affected the normal mining and operation of gas fields. It is imperative to find an anti-corrosion measure suitable for the production conditions of the Su 203 well area. The corrosion of the Su 203 well area was investigated, and a high-performance alloy coating was evaluated for indoor and field applications. The results show that the corrosion situation of Su 203 well was serious, the highest corrosion rate was 2.3 mm/a, and the phenomenon of perforation occurred. The high-performance alloy coating had good hardness, wear resistance and corrosion resistance, and it could significantly reduce the corrosion rate of samples. The average corrosion rate of the high-performance alloy coating was only 3.84% to 4.54% of uncoated samples. After replacing the water transfer pipeline in the 19 station of Sunan as a high-performance alloy coating pipeline, the phenomenon that the wall thickness was significantly thinned was not found, indicating that the high-performance alloy coating had good corrosion resistance and could be popularized in the Su 203 well area.