Polymaleic Acid (PMA 50%)
Low molecular weight polycarboxylic acid scale inhibitor specifically engineered for high-temperature steam boilers, thermal flash desalination (MSF/MED), and severe high-alkalinity cooling water programs. Stable up to 300°C (572°F).
Technical Specification Target
High-Temperature Mechanism & Crystal Distortion
Unlike standard polyacrylates that degrade above 160°C, Polymaleic Acid maintains 100% active polycarboxylic backbone integrity up to 300°C.
PMA adsorbs onto forming calcite crystal faces, causing profound lattice deformation. The resulting calcium carbonate precipitate forms a non-adherent, fluffy sludge easily evacuated via boiler bottom blowdown.
Standard Industrial Dosage
| Application | Recommended Dosing |
|---|---|
| High-Pressure Steam Boilers | 5.0 – 15.0 ppm |
| Thermal Desalination (MSF/MED) | 2.0 – 5.0 ppm |
| High-Stress Cooling Loops | 5.0 – 10.0 ppm |
| Oilfield Water Injection | 10.0 – 25.0 ppm |
Packaging, Handling & Storage
- Packaging Options: 50 kg carboys, 250 kg HDPE drums, 1,250 kg IBC containers, and bulk tankers.
- Storage Conditions: Store in acid-resistant containers in a well-ventilated warehouse (5°C to 40°C).
- Shelf Life: 12 months in factory-sealed containers.
- Handling Safety: Acidic substance. Always wear nitrile gloves, safety goggles, and rubber boots during dispensing.
Frequently Asked Questions: Polymaleic Acid (PMA 50%)
Expert technical answers on dosing, chemistry, handling, and application performance.
Q1. What is Polymaleic Acid (PMA 50%) and what makes it unique?
Polymaleic Acid (CAS 26099-09-2) is a low molecular weight polycarboxylic acid scale inhibitor characterized by exceptional thermal stability exceeding 300°C and 100% phosphate-free composition.
Q2. What is the primary industrial application of ZEELCHEM™ 200 PMA?
ZEELCHEM™ 200 is specifically designed for high-pressure steam boilers, multi-stage flash (MSF) and multi-effect distillation (MED) thermal desalination plants, and severe oilfield reinjection loops.
Q3. What is the standard dosage of PMA 50% in industrial systems?
In high-pressure steam boilers, dosing ranges from 5.0 to 15.0 ppm active. In thermal desalination units, 2.0 to 5.0 ppm active is injected directly into raw seawater intake.
Related Scale Inhibitors & Additives
Polyacrylic Acid (PAA 50%)
Industry-standard homopolymer for cooling tower and RO scale control.