The results indicated that DG3 was excel to DG1 or BTA, but the corrosion speed in the medium with DG3 was close to that with DG2, which were 0.0021mm/a and 0.0020 mm/a respectively.

• 5mg/L DG2与5mg/LPBTCA复配成DG3后其缓蚀性能同DG2相比差别不大；相同条件下的30℃淡水中添加DG3后稳定存在的钙离子浓度为234.；04mg/L;