於現今鋼筋混凝土結構物中，一般採用熱浸鍍鋅、鋅粉塗裝或環氧樹脂鋼筋作為鋼筋之防蝕策略，但由於上述材料成本高昂，或者因混凝土本身開裂、氯離子侵入之因素而導致無法發揮預期之抗蝕效能。因此，本研究使用成本相對較低且使用上較為方便之腐蝕抑制劑，探討影響其抗蝕效能之因子。試驗過程中，首先以參照CNS 12457探討腐蝕劑用量與抗蝕效能之關係，接著以竹節鋼筋製作試體後，以交流阻抗法、直流極化法及脈衝電流法量測鋼筋之極化阻抗與腐蝕電流密度，進而計算腐蝕速率與腐蝕量，以此評估腐蝕抑制劑之抗蝕效能。根據試驗結果，在腐蝕抑制劑用量12 kg/m3下，當鋼筋浸泡於含氯離子之高鹼性環境中仍會發生腐蝕，鹽水濃度由0%增加至3.5%時，實際腐蝕量增加54%。就含鋼筋之水泥砂漿試體而言，在相同腐蝕抑制劑用量(10 kg/m3)下，砂漿水灰比為0.6時，所測得之腐蝕電位較水灰比為0.4時低，且腐蝕量增加67-107%。水灰比0.4且鹽分含量0.2%時，所測得之腐蝕電位較鹽分含量為0.04%時低，且腐蝕量增加90-101%。因此，保護層的水灰比與鹽分含量皆會影響腐蝕抑制劑之抗蝕效能。若未來欲評估腐蝕抑制劑之抗蝕效能，可改採較接近現地腐蝕環境的條件進行。建議將試驗材料更換為竹節鋼筋、降低鹽水濃度及提高pH值，並量測鋼筋之重量損失。於鋼筋浸鹽水試驗中，以交流阻抗法與直流極化法並行量測其腐蝕速率。於內埋鋼筋之砂漿試體，可以脈衝電流法與交流阻抗法並行量測。

In reinforced concrete structures, the hot-dip galvanized, zinc coated, or epoxy coated reinforcements are commonly used as corrosion protection strategies for the reinforcing steel. However, due to the high cost of these materials, the concrete cracking or the ingress of the chloride ions, the expected corrosion resistance cannot be achieved. Therefore, in this study, a corrosion inhibitor with a relatively low cost and convenience in use was used to explore the factors affecting its anti-corrosion performance. During the study, the relationship between the amount of the corrosion inhibitor and the its anti-corrosion was first investigated in accordance to CNS 12457. Then, the polarization impedance and corrosion current density of the steel bars were measured by AC impedance, linear polarization and galvanostatic current. The corrosion rate and the corrosion amount were calculated. The test results showed that, with the corrosion inhibitor dosage of 12 kg/m3, corrosion still occurred when the reinforcement was immersed in a highly alkaline environment containing chlorine ions, and the amount of the corrosion was increased by 54% when the chloride concentration was increased from 0% to 3.5%. For the reinforcement embedded in the cement mortar with a corrosion inhibitor dosage of 10 kg/m3, the specimen with a cement-to-water (w/c) of 0.6 had a lower corrosion potential and higher amount of corrosion by 67-107% than that with a w/c of 0.4. With a w/c of 0.4, the specimen with a chloride content of 0.2% had a lower corrosion potential than that with a chloride content of 0.04% and its has a increased amount of corrosion by 90-101%. Therefore, both the w/c and the chloride content in the mortar protection layer are influencing factors. To evaluate the anti-corrosion of the corrosion inhibitor, it is suggested that the test parameters can be close to the exposure conditions in practice. A deformed bar can be used in a test solution with a low chloride content and high pH. Its weight loss can be measured and its corrosion rate can be measured by linear polarization and AC impedance during the test. For the mortar specimen with an embedded reinforcement, the corrosion rate can be measured through the AC impedance and the galvanostatic current.

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