2-羟基膦酰基乙酸 (HPAA)简介
2-羟基膦酰基乙酸 (HPAA)
2-Hydroxyphosphonocarboxylic Acid (HPAA)
【CAS】 2809-21-4
别名： 膦酰基羟基乙酸
分子式 C2H5O6P 相对分子质量：156
结构式
HPAA化学稳定性好，不易水解，不易被酸碱所破坏，使用安全可靠，无毒无污染，HPAA能提高锌的溶解度，具有极强的缓蚀作用，HPAA缓蚀性能比HEDP、EDTMP高。 HPAA主要用做金属的阴极缓蚀剂，广泛用于钢铁、石化、电力、医药等行业的循环冷却水系统的缓蚀阻垢，适合用作我国南方低硬度、易腐蚀水质的缓蚀剂。
2-羟基膦酰基乙酸 (HPAA) 技术指标
| 项 目 | 指 标 |
| 外 观 | 暗棕色液体 |
| 固含量 % ≥ | 50.0 |
| 有机膦（以PO43-计）% ≥ | 25.0 |
| 磷酸（以PO43-计）% ≤ | 1．5 |
| 亚磷酸（以PO33-计）% ≤ | 3．0 |
| 密度（20℃）g/cm3 ≥ | 1.30 |
| pH值(10g/L水溶液) ≤ | 3.0 |
HPAA的使用方法:
HPAA与低分子量的聚合物一起组成的有机缓蚀阻垢剂性能优良。HPAA与锌盐复配效果更佳。
HPAA的包装与储存
HPAA用塑料桶包装，每桶30kg。贮于室内阴凉处，贮存期为十二个月。
HPAA的安全防护
HPAA为酸性液体，操作时注意劳动保护，应避免与皮肤、眼睛等接触，接触后用大量清水冲洗。
Properties:
HPAA is chemically stable, hard to be hydrolyzed, hard to be destroyed by acid or alkali, safety in use, no toxicity, no pollution. HPAA can improve zinc solubility. Its corrosion inhibition ability is 5-8 times better than that of HEDP and EDTMP. When built with low molecular polymers, its corrosion inhibition effect is even better.
Specification:
| items | index |
| Appearance | Dark umber transparent viscous liquid |
| Solid content % | 47.0-50.0 |
| Phosphorous acid(as PO33-)% | 4.0 max |
| Density (20℃)g/cm3 | 1.30 min |
| pH(1% solution) | 1.0-3.0 |
Usage:
HPAA is mainly used as cathode corrosion inhibitor in oilfield refill water system in fields such as steel & iron, petrochemcal, power plant and medical industries. When built with zinc salt, the effect is even better.
Package and Storage:
Normally In 250kg net Plastic Drum, IBC drum can also be used as required. Storage for one year in room shady and dry place.