Zinc-Orthophosphate Blends
Corrosion Inhibitor Products
Zinc-orthophosphate is an excellent corrosion inhibitor to eliminate or minimize red water problems associated with the corrosion of iron. Zinc-orthophosphates work differently from polyphosphates in that they are not sequestering type inhibitors. Instead, it produces a microscopic film on metal surfaces that acts as a barrier to corrosive environments that would normally cause corrosion. As a result, undesirable corrosion products such as iron, lead, and copper are not produced and system protection is enhanced. Zinc-orthophosphate is also beneficial in suppressing the release of asbestos fibers from AC piping. It plays a valuable role in potable systems to minimize the release of lead and copper from system piping and help municipal systems meet regulatory requirements.
Treated with Mid South |
Treated with competitor's |
Mid South's zinc-orthophosphate product selection:
| Appearance | Clear Liquid |
Clear Liquid |
Clear Liquid |
Clear Liquid |
Clear Liquid |
Clear Liquid |
Clear Liquid |
| Phosphate/ zinc ratio | 1:1 |
1:1 |
3:1 |
3:1 |
5:1 |
3:1 |
5:1 |
| Product type | Sulfate |
Sulfate |
Chloride |
Chloride |
Chloride |
Sulfate |
Chloride |
| Specific gravity | 1.265 |
1.36 |
1.565 |
1.3 |
1.635 |
1.41 |
1.41 |
| pH (neat) | 1.29 |
1.1 |
<1.0 |
<1.0 |
<1.0 |
<1.0 |
<1.0 |
| Weight/gallon | 10.51 |
11.34 |
13.10 |
10.84 |
13.64 |
11.76 |
11.80 |
| Freeze point | <16°F |
<14°F |
-20°F |
-50°F |
-15°F |
3°F |
-12°F |
| Total phosphate (±0.5%) |
7.5 |
10.0 |
36.0 |
22.5 |
50.0 |
24.0 |
32.5 |
| NSF max. feed rate | 20 mg/L |
20 mg/L |
24.5 mg/L |
40.4 mg/L |
20 mg/L |
25 mg/L |
29.6 mg/L |
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Note: All Mid South Chemical zinc-orthophosphates are certified to ANSI/NSF standard 60 |