通过浸泡试验、电化学试验研究了HastelloyB3合金在不同条件盐酸中的腐蚀行为。结果表明: 合金在不同HCl含量与温度的纯盐酸中均具有良好的耐蚀性, 随着温度与HCl含量的提高, 合金腐蚀速率虽有所增长, 但仍然处于钝化态；盐酸中添加氧化性离子Fe3+后, 腐蚀速率急剧增大并伴随着点蚀, 随着Fe3+含量的提高, 腐蚀速率快速增大；在纯盐酸中, HastelloyB3表面生成Mo4+钝化膜, 对基体起到保护作用, 但添加氧化性Fe3+后, 钝化膜中的Mo4+极易被氧化成Mo6+, 发生溶解, 使合金由钝态向过钝化态转变, 导致耐蚀性急剧下降；HastelloyB3合金适用于不同HCl含量与温度的纯盐酸中, 但不适用于含氧化性离子或溶解氧高的盐酸中。

The corrosion behavior of HastelloyB3 alloy in hydrochloric acid in different conditions was studied by immersion tests and electrochemical measurements. The results show that the HastealloyB3 alloy had good corrosion resistance in pure hydrochloric acid with different concentrations of HCl at test temperatures. With increasing the concentration of HCl or test temperature, the corrosion rate of the alloy increased slightly, but the alloy still remained in passivation. When oxidizing ions Fe3+ were added into pure hydrochloric acid, the corrosion rate of the alloy increased rapidly accompanied with pit corrosion. When the concentration of Fe3+ increased, the corrosion rate continued to increase rapidly. In pure hydrochloric acid, the passive film composed of Mo4+ on the alloy surface provided protection to the matrix of HastelloyB3 alloy. When oxidizing ions Fe3+ were added, the Mo4+ in the passive film was easily oxidized to Mo6+, which made the passive film dissolve and the alloy transform from passivation state to transpassivation state, and the corrosion resistance reduce rapidly. The HastelloyB3 alloy could only be applied in pure hydrochloric acid with different concentrations of HCl at test temperatures, but is not recommended for application in the media with oxidizing ions or high concentration of dissolved oxygen.