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在全国已有不少船闸采用钢闸门。过去,大多采用油漆防腐,不仅花费大、保护寿命短,而且闸门除锈、涂漆时,必须停航排水,影响通航的损失亦大。由于钢闸门大多采用普通碳钢,在一般江河水中,其均匀腐蚀速度比在海水中低)一般为0.01～0.02mm/a),但局部腐蚀的坑蚀深度一般为0.15～0.30mm/a,有的则高达0.5mm/a。采用涂料和外加电流阴极保护联合防腐蚀,在挡潮闸、节制闸上已有成功先例,但在船闸钢闸门特别是横拉门上如何实施则是本试验的目的。试验在裕溪口船闸闸门上进行。该船闸长195m,宽15m,上、下游两扇钢闸门的表面积约为2582m~2,其水下面积约为2100m~2。
There are many steel locks in the country. In the past, most of the paint anti-corrosion, not only costly, short life protection, and the gate rust, painting, you must suspend drainage, affecting the loss of navigation is also large. Since most of the steel gates are made of common carbon steel, their average corrosion rate is lower than that in seawater in general river water) is generally 0.01-0.02 mm / a), but the pit corrosion depth of local corrosion is generally 0.15-0.30 mm / a, Others are as high as 0.5mm / a. The use of paint and applied current cathodic protection joint anti-corrosion, tidal gates, control gates have been a successful precedent, but in the lock steel gate, especially horizontal sliding door on how to implement it is the purpose of this experiment. The test was carried out on the gate of Yuxiakou Ship Lock. The ship gate length 195m, width 15m, the upper and lower two steel gate surface area of about 2582m ~ 2, the underwater area of about 2100m ~ 2.