Universal Corrosion and Scale Inhibitor

The VOLGA inhibitor is a concentrate based on a mixture of food-grade poly- and orthophosphates, the reagent is not toxic and has virtually unlimited shelf life (is a mineral reagent).

Water treated with VOLGA is suitable for drinking without any reservations. In addition, there is a significant improvement in the organoleptic properties of drinking water.

VOLGA forms a monomolecular (not increasing in thickness) protective film – iron-phosphate coating on the internal surface of pipelines and equipment. It does not matter whether calcium compounds are present in the water or not. The phosphate film protects metal products from corrosion and reduces the adhesion of impurities.

When VOLGA is used in heat networks, there is no need for deaerators, since the resulting polyphosphate film protects the metal surface from contact with oxygen.

It works effectively at water pH values from 5 to 11. When using VOLGA, there is no need to use any other reagents or water treatment methods to correct the water pH.

A very important advantage of using UIKN "VOLGA" in water supply networks is the ability of municipal water supply enterprises to direct water into the water supply network at lower pH levels due to the fact that VOLGA ensures prevention of pipeline corrosion at pH in drinking water starting from 5,0.

This means that you can reduce or completely eliminate the use of reagents for regulating the pH of drinking water, such as sodium hydroxide (NaOH), lime (CaO) or sodium carbonate (Na₂CO₃), and thereby reduce chlorine consumption for water disinfection.

Reduced chlorine leads to a decrease in the level of carcinogenic trihalomethanes, haloacetic acids and other chlorination by-products in drinking water.

Even in the case of using UV irradiation at water treatment plants for disinfection of drinking water, UV does not provide a residual effect, i.e., there remains the need to use some reagents to maintain a residual level of disinfectant in the water supply distribution network. Sodium hypochlorite is used for this purpose. VOLGA can effectively prevent the buildup of corrosion deposits in sodium hypochlorite dosing pipelines and prevent cavitation and, accordingly, destruction of chemical metering pumps.

The working solution of UIKN "VOLGA" in hot water is prepared easily. In cold water, it is recommended to use mechanical mixing (drill with attachment, mixer, stirrer, etc.).

There are no restrictions on the amount of iron that can be bound. For every 1 mg/l of iron in water, use 1 mg/l of UIKN "VOLGA".

UIKN "VOLGA" will convert silicon to a suspended state. The dose of UIKN "VOLGA" does not need to be increased due to the presence of silicon in the water.

UIKN "VOLGA" works stably at temperatures up to 190°C

UIKN "VOLGA" is used in cold and hot water supply systems, heating systems, and as a corrosion and scale deposition inhibitor for produced water. In real hot water supply systems, water temperature does not exceed 140°C – 150°C.

UIKN "VOLGA" works effectively and is stable in the temperature range from – 7°C to + 190°C without precipitation from the solution. Due to unique patented technology and a composition with no analogues, UIKN "VOLGA" at such extreme temperatures undergoes hydrolysis of no more than 5% of polyphosphates into orthophosphates (recall that UIKN "VOLGA" is a safe non-toxic mixture consisting of ~ 77% polyphosphates and ~ 23% orthophosphates). Such insignificant conversion of polyphosphates to orthophosphates at extreme temperatures is one of the indicators of why UIKN "VOLGA" is significantly more effective than other corrosion inhibitors on the market.

The residual content of orthophosphates in water is 25% of the UIKN "VOLGA" dose and remains stable over time and throughout the system. This is very important because metal ions, which due to the formation of complexes with UIKN "VOLGA" in solution have lost their chemical activity and ability to precipitate, will remain so until the end consumer taps. This also applies to calcium and magnesium scale in hot water supply systems.

We do not recommend using UIKN "VOLGA" in completely closed systems, as it, like other minerals, will concentrate and eventually precipitate out of the solution. In open-loop hot water supply systems, UIKN "VOLGA" works very effectively.

The same as in municipal drinking water supply systems – up to 11,6 mg/l.

The presence of UIKN "VOLGA" in the makeup water does not cause disruption of the operation of ion exchange filters. The exchange capacity of the cation exchanger will not change. The use of UIKN "VOLGA" after ion exchange filters will make the water non-corrosive.

The presence of UIKN "VOLGA" in the makeup water does not cause disruption of the operation of reverse osmosis membrane filters; the water after the filters will not contain UIKN "VOLGA". The use of UIKN "VOLGA" after reverse osmosis filters will eliminate the need for pH correction and make the water non-corrosive.

According to the Sanitary Rules SanPiN 1.2.3685-21 "Hygienic standards and requirements for ensuring the safety and (or) harmlessness for humans of environmental factors" (Table 3.13, line 966) it is necessary to analyze the content of orthophosphate PO₄ in water using standard methods. The MAC is 3,5 mg/l.

In accordance with GOST 18309-2014 "Methods for determining phosphorus-containing substances" the determination of phosphate ion is carried out by phosphorus. The mass of phosphorus in the molecular weight of the VOLGA inhibitor is 30%. Accordingly, the maximum dosage of UIKN "VOLGA" into makeup water should not exceed 11,6 mg/l in the absence of orthophosphates in the water source.

The only parameter that needs to be analyzed is the content of orthophosphate PO₄ in water using standard methods. For these purposes, a portable device can be used, in particular a portable phosphate colorimeter or standard methods.

When using a portable colorimeter, the residual concentration of UIKN "VOLGA" in water can be determined by the formula:

If necessary, our company can provide a portable phosphate colorimeter.

It is necessary to analyze the content of orthophosphates PO₄ in water. Monitoring PO₄ in water can be difficult, since the natural level of phosphates in water can be high and constantly changing, so the best approach is to correctly calculate the dose of UIKN "VOLGA" to be introduced into the treated water.

To determine the amount of UIKN "VOLGA" that needs to be introduced into the treated water, the calculation is performed as follows:

We recommend using corrosion meters with a set of metal test plates, which allow you to measure the rate and amount of corrosion under various corrosive conditions and allow you to test the effectiveness of various corrosion inhibitors over a certain period of time (usually 90 days) or CT™ corrosion meters, which allow you to measure water corrosivity and determine the presence of pitting or general corrosion in pipelines in real-time "on-line" mode.

The measurement of the level of deposits and internal corrosion before and after treatment with UIKN "VOLGA" is recommended to be conducted in accordance with the general requirements and control methods of the sectoral standards of Russia for centralized municipal drinking water supply and communal heat supply systems and corrosion protection.

To measure internal corrosion when using UIKN "VOLGA", you can use corrosion meters of foreign or Russian manufacture. In particular, you can use instruments of types R-5126, Z-5126M, PIK, SIK (portable and stationary corrosion indicators), equipped with sensors – primary electrochemical converters of type EP. These instruments work using accelerated corrosion testing methods based on measuring polarization resistance and the ability to assess instantaneous and integrated internal corrosion rates (measured in mm/year).

In cooling towers, part of the circulating cooling water is lost due to droplet carry-over (R_carry = 0,05-3,5%) and evaporation (R_evap = 1-1,5%). Naturally, due to evaporation, the salt content of the water in the circulating system increases. The concentration of phosphates also increases with continuous dosing of UIKN "VOLGA". To avoid an increase in the concentration of UIKN "VOLGA" in the circulating cooling system, its content can be regulated either by periodically interrupting the supply of the reagent or by water exchange using system purging R_purge and compensating for losses by adding technical water to the system in the appropriate amount.

The table below shows the minimum water flow rates for flushing pipelines through hydrants depending on the diameter of the pipelines:

Warranty shelf life is 2 years when storage conditions are met, but the shelf life of the product itself is more than 5 years (VOLGA is a mineral reagent).