To ensure that open and closed cooling systems are well maintained and operate at optimum efficiency it is essential that the correct water conditions are maintained at all times. This can be achieved using carefully selected scale and corrosion inhibitors designed specifically for such cooling systems.
Accepta’s advanced technology cooling water scale and corrosion inhibitors have been scientifically formulated to protect cooling systems from the effects of both scale build-up and metallic corrosion in a single product.
Our scale and corrosion inhibitors deliver improved performance, helping to reduce maintenance costs, improve reliability and optimise operational efficiency.
Consider our Bromgard chemicals which combine scale and corrosion inhibitors with a bromine precursor added together with an Activator to bring together all round treatment. See the brochure here for more details.
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Bromgard Range
Bromgard products not only control scale formation, corrosion and fouling but also incorporate a precursor which will produce the powerful cooling water biocide, bromine, when dosed in conjunction with Activator 120 or similar halogen release agent. This simplifies treatment and gives great results!
Download the Bromgard brochure PDF
| Code | Description | Normal system water calcium hardness range | Target cooling water Ryznar Index (RSI) | |
|---|---|---|---|---|
| Accepta 2303 | Bromgard phosphate based corrosion and scale inhibitor for low hardness. Very good at high temperatures. | 20 - 200 | 7 - 9 | |
| Accepta 2304 | Bromgard zinc based multi-functional corrosion and scale inhibitor and bromine precursor. For soft to medium hardness waters. | 0 - 300 | 6 - 9 | |
| Accepta 2305 | Bromgard blend of organic inhibitors for use where heavy metals or phosphates are restricted. For medium to high hardness waters. | 200 - 600 | 4 - 6.5 | |
| Activator 120 | Activating halogen donor for use with Bromgard inhibitors to produce bromine biocide in-situ. | Bromine based inhibitor Activator |
When using Bromgard products a bromine pre-cursor is continuously maintained in the system water. The biocidal power of bromine is released by the controlled addition of an oxidising activating solution that activates the precursor to form the correct concentration of bromine. The activating solution also contains a biodispersant that ensures effective penetration of bromines into existing biofilms, Control of the addition of the activating solution is preferably by a redox probe and controller linked to an injection pump, see Coolplex Control Unit.
Bromgard products and a redox control system provides the most cost-effective solution to the use of bromine in a cooling water system.
Bromgard products and activators should preferably only be used in conjunction with a Coolplex controller & manifold as this is the only way to ensure that the Bromgard program provides the correct control of system corrosion, scale & microbiological fouling.
Download the Coolplex brochure PDF
Non-bromine multifunctional inhibitors
Each of these popular inhibitors is a multifunctional blend which includes both scale and corrosion inhibitors for steel, copper and brass as well as polymer dispersants to prevent fouling, these provide powerful treatment to inhibit scale or corrosion but do not contain a bromine precursor.
| Code | Description | Normal system water calcium hardness range | Target cooling water Ryznar Index (RSI) | |
|---|---|---|---|---|
| Accepta 2312 | A blend of organic inhibitors for use where heavy metals or phosphates are restricted. Intended for medium to high hardness waters. | 300 - 600 | 4 - 6.5 | |
| Accepta 2313 | A novel zinc based multi-functional corrosion and scale inhibitor. For soft to medium hardness waters. | 0 - 300 | 6 - 9.0 | |
| Accepta 2314 | A low dose rate blend of organic inhibitors for use where heavy metals or phosphates are restricted. For medium to high hardness waters. | 300 - 800 | 4 - 6.5 | |
| Accepta 2536 | A silicate based product for soft to medium hardness water | 50 - 400 | 5.5 - 8.0 | |
| Accepta CG364 | A phosphate based product for extremely corrosive waters | 20 - 200 | 7 - 9.0 | |
| Accepta CG821 | A molybdate based product for soft to medium hardness water | 20 - 300 | 5.5 - 8.5 |
Water Corrosion or Scale deposition tendency
Professor Langelier’s research, complete in 1936, defines conditions in which water is balanced with calcium carbonate, making it possible to predict the likelihood of a given water to either precipitate or dissolve calcium carbonate. Being the universal solvent that it is, if water is out of balance, it will seek to find its own equilibrium (0.0 LSI.) in the case of swimming pools, water can even draw calcium out of the plaster that lines the pool walls, or in industrial systems draw from the protective coating on pipework at an LSI of -0.5 LSI and below. In the case of over-saturation eg. >0.5 LSI the water will become scale forming.
The relationship between the actual pH of a water sample and the pH at which it is just saturated with calcium carbonate (pHs) is called the Langelier Saturation Index (LSI) and is equal to (pHs – pH).
However, the way in which the LSI is calculated, two different waters; one having high levels of hardness (scale forming), and the other with low level of hardness (corrosive) could theoretically have the same Langelier Saturation Index (LSI) due to the effects pH, Alkalinity and Temperature have on the calculation. For this reason we reach for the Stability index developed by Ryzner (RSI) which goes further and distinguishes between two waters based on an index of actual operating results with waters of various LSIs.
The RSI of water is calculated by: 2 x pHs – pH
The results can be interpreeited according to the following guidelines:
| Ryzner Stability Index | Tendency of Water |
|---|---|
| 4.0 - 5.0 | Heavy Scale |
| 5.0 - 6.0 | Light Scale |
| 6.0 - 7.0 | Light Scale or Corrosion |
| 7.0 - 8.0 | Significant Corrosion |
| 8.0 - 9.0 | Heavy Corrosion |
| Above 9.0 | Intolerable Corrosion |
Kintec range & niche products for specialist applications
| Code | Application | Description |
|---|---|---|
| Kintec 3208 | High stress open re-circulating cooling systems | All Organic Corrosion & Scale Inhibitor |
| Kintec 3209 | Suitable under extreme system conditions | Halogen stable polymer blend scale inhibitor |
| Kintec 3218 | High stress open re-circulating cooling systems | All Organic Corrosion & Scale Inhibitor |
| Kintec 3252 | Used in Phosphate treatment programs | Multi-Functional Cooling Water Dispersant |
| Kintec 3260 | Supplemental to primary treatment | Organic Corrosion Inhibitor for Yellow Metals |
| Kintec 3262 | Very Low Hardness systems | High quality corrosion Inhibitor |
| Accepta 2830 | Scale & Corrosion inhibitor with tracer dye for control & monitoring | Multi-Functional treatment |
| Accepta 2511 | Softened or blended water conditions | Eco-Friendly Corrosion & Scale Inhibitor |
| Accepta 2800 | Open Cooling Water Systems, Tanks, Marine & Seawater | Tallow Amine Film Forming Corrosion Inhibitor |
| Accepta 0504 | Soft water conditions | Molybdate / Zinc Scale & Corrosion Inhibitor |
| Accepta 2322 | Supplemental to primary treatment | Organic Corrosion Inhibitor for Yellow Metals |
| Accepta PS350 | Polymer Sludge Conditioner | Polymer Scale dispersant & sludge conditioner |
