Corrosion Inhibitor Soft-Medium Hardness Waters


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WTPH525 is a multi-functional treatment for soft to medium hardness make-up waters that offers excellent corrosion control together with a dispersant to reduce scale deposition in critical equipment.

WTPH525 is also strongly acidic, and is designed to aid pH control in cooling waters below pH 8.3 thus reducing the potential for scaling.

WTPH525 is based upon zinc/phosphonate technology incorporating anti-scaling additives.

Product Data

Physical State Brown liquid
Specific Gravity (SG) 1.30 – 1.32
pH <1



Dosing and Testing

  • WTPH525 is shot dosed at 400 ppm to system waters to provide initial passivation
  • Optimal corrosion control and cost-effectiveness are achieved by continuous proportional dosing with a dosage rate of 100 -150 ppm (dependent upon system conditions) recommended
  • Details of proportional dosing systems can be supplied by our representatives
  • A Zinc drop test kit (WTPTK110) is available to monitor chemical dosing (expected range of 2 - 4 ppm for good corrosion control).
HANDLING  Please refer to material safety data sheet for detailed handling/storage instructions.
  • Avoid contact with eyes, skin and clothing.
  • In case of contact, immediately remove contaminated clothing and wash skin with soap and water.
  • For eyes, flush with plenty of water and seek medical attention. Harmful if swallowed.


WTPH525 treatments are shipped in 25 litre and 200 litre non-returnable drums.


Field Representatives will work closely with customer personnel to assure the effective application of the water treatment programme. Regular service calls can be provided by qualified personnel.

More Information

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The above information is believed to be correct but does not purport to be all inclusive and shall be used only as a guide. The company shall not be held liable for any damage resulting from handling, contact, mis-use or mis-application of the above product. In all instances the user should satisfy themselves that this product is suitable for the anticipated application and should carry out suitable and sufficient risk/COSHH assessments and a method of use statement.

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