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水轮机过流部件表面防护材料筛选试验及防护方案的确定是三门峡水电站汛期浑水发电试验的一项重要内容。通过近４０种抗磨材料的筛选试验，确定了如下的防护方案：①在叶片头部采取ＳＰＨＧ１合金粉末喷焊材料一步法直接喷焊防护；②对叶片背面外缘强气蚀区和端面，在采用Ａ１３２焊条堆焊的基础上，采用ＳＰＨＧ１合金粉末喷焊材料两步法直接喷焊防护；③对叶片背面气蚀较轻部位和转轮体，用Ａ１３２焊条堆焊防护；④采用ＧＢ１焊条堆焊措施防护转轮室中环；⑤对叶片正面、导水叶、泄水锥及支持盖等部件可采用环氧金刚砂涂层防护。
The test of surface protective material screening test and the protection scheme for overcurrent components of turbine are an important part of turbid water power generation test in flood season of Sanmenxia Hydropower Station. Through the screening test of nearly 40 kinds of wear-resistant materials, the following protection schemes were determined: ① One-step direct spray protection of SPHG1 alloy powder sprayed material was adopted on the blade head; ② The cavitation area and end face of the back of the blade were strongly cavitated, The use of A132 electrode surfacing based on the use of SPHG1 alloy powder spray material two-step direct spray protection; ③ on the back of the blade cavitation lighter parts and runner body, with A132 electrode surfacing protection; ④ GB1 electrode Surfacing measures to protect the middle of the runner room; ⑤ on the front of the blade, the guide vane, drainage cone and support cover and other components can be coated with epoxy diamond coating protection.