TA9 titanium plate hydrochloric acid resistance‌

TA9 titanium plates exhibit significantly superior corrosion resistance in hydrochloric acid environments compared to industrial pure titanium. The addition of a small amount of palladium to TA9 titanium alloy (Ti-0.2Pd) effectively enhances its stability in reducing acids (such as hydrochloric acid), reducing its corrosion rate by up to 10 times compared to industrial pure titanium. Particularly in air-filled hydrochloric acid solutions, TA9 shows a significant positive shift in its stability potential, resulting in superior corrosion resistance.

However, the hydrochloric acid resistance of TA9 titanium plates is significantly affected by the medium conditions. In completely oxygen-free or oxidizing hydrochloric acid environments (such as argon or nitrogen-filled environments), its passivation performance decreases significantly. Therefore, TA9 titanium plates are more suitable for hydrochloric acid environments containing oxygen or oxidizing agents, such as hydrochloric acid systems in hydrometallurgical industries.

Furthermore, while TA9 titanium plates can withstand certain concentrations of hydrochloric acid at room temperature, their corrosion resistance decreases significantly with increasing temperature. In contrast, titanium-palladium alloys (such as Ti-0.2Pd) demonstrate superior hydrochloric acid resistance, capable of withstanding hydrochloric acid solutions up to 27%. Due to its cost advantage, TA9 titanium plate still has high application value in corrosive media such as hydrochloric acid.