Description
Polyphosphates with chains by different lengths are used to control the solutes that cause hardness and salts of some metals. These chains form complexes with solutes which are present in water and prevent the deposition of calcium and magnesium carbonate compounds on heat transfer surfaces. On the other hand polyphosphates are important cathodic inhibitors that are formed by the deposition mechanism by the electrical decomposition of a durable layer on the cathode surfaces of most metals. These compounds also protect the metal surface from being corroded by some anodic effects.
The point to consider is the selection of suitable polyphosphate compounds to achieve maximum protection of the closed circuit cooling towers system against corrosive and sedimentation agents. Mitreh 1066 solution with special formulation prevents the deposition of various solutes up to 70% and prevents corrosion of the metal surface by corrosive and destructive agents up to 98%.
Calibration Using Mitreh 1066 Solution:
In order to control scale and corrosion in closed circuit cooling tower systems, the amount of solution consumption varies according to the physical and chemical conditions of the inlet water.
To calculate more accurately, consider the following:
1- Sample analysis of system feed water
2- Ensuring that the system is clean (in terms of scale and other contaminants)
3- The amount of water circulating and the volume of water consumed (make-up)
4- Complete system monitoring and field inspection of various parts of the circuit in terms of corrosion
Some Physical Properties of the Solution:
Property | Property | ||
Liquid | Physical state | 5.7 – 6.2 | pH |
Very transparent brown | Color | 94 – 99 | Boiling temperature range (˚C) |
Odorless | Odor | -5 – -2 | Freezing temperature range (˚C) |
1.103 – 1.108 | Density at 20˚C (gr⁄ml) | Dissolves rapidly | Solubility in water |
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