Steamate* FM1000
Condensate Corrosion Inhibitor
- Unique filming inhibitor for steam condensate corrosion control
- Protects steam condensate system surfaces against carbonic acid, dissolved oxygen corrosion, and erosion-corrosion
- Eliminates gunking and fouling characteristic of conventional filming amines
- Easier to feed and handle than conventional filming amine formulations
- Provides superior corrosion protection even at low pH levels
- Reduces treatment cost versus neutralizing amine programs in systems with high alkalinity feedwater
- Safe for workers – No SARA 302/313 warnings; no California Proposition 65 chemicals; no carcinogenicity warnings; compatible with hands- off chemical feed options
- Safe for the environment – Available in a wide variety of customized containers and delivery methods, including ChemSure* Drumless Delivery Services; no reportable spill quantity
Steamate FM1000 contains the OptiFilm* molecule, a unique filming corrosion inhibitor designed to prevent the corrosion of metal surfaces in steam condensate systems. Corrosion control is achieved through the formation of an adherent, non-wettable film on the metal surface. This film serves as a barrier between the metal and the corrosive species present in the steam condensate. Because it contains no nitrogen-bearing materials, Steamate FM1000 is a treatment option for systems that cannot tolerate nitrogen because of process constraints or materials incompatibility.
Corrosion in steam condensate systems is frequently a severe problem. Carbon dioxide (CO2) is the most common cause of this corrosion. CO2 is produced in the boiler due to thermal breakdown of the natural alkalinity, principally bicarbonate ions, which enter with the feedwater. The reactions are as follows:
- 2 NaHCO3 + HEAT ® Na2CO3 + CO2 + H2O
- Na2CO3 + H2O + HEAT ® 2 NaOH + CO2
The conversion of bicarbonate alkalinity to carbon dioxide is a function of boiler temperature, pressure, and residence time. Because it is extremely volatile, the carbon dioxide exits the boiler with the steam produced. At points of condensation, some fraction of the carbon dioxide present in the steam enters in the condensate, forming carbonic acid:
- CO2 + H2O H2CO3 ® H+ + HCO3
The carbonic acid hydrolyzes to produce hydrogen ions which cause acidic corrosion of iron and copper alloy surfaces in the steam condensate system. The corrosion reaction for iron is shown below:
- 2 H2CO3 + Fe ® Fe(HCO3)2 + H2
Excessive corrosion of the condensate system can lead not only to costly equipment failure and increased maintenance costs but can also cause deposition of metal oxide corrosion products on boiler heat transfer surfaces if the condensate is recovered as feedwater. Metal oxide deposition on boiler heat transfer surfaces will result in lower efficiency and higher fuel costs and can lead to tube failure due to long-term overheating.
Dissolved oxygen is another major cause of condensate system corrosion. Oxygen contaminationof steam condensate can occur due to inefficient or improper feedwater deaeration, air leakage at pump seals, receivers, and flanges, leaking heat exchangers, and systems which are under vacuum. Pitting corrosion caused by dissolved oxygen can cause rapid failure of critical equipment in the steam distribution system. In addition, traces of oxygen in the condensate can significantly accelerate the rate of acidic corrosion.
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Erosion-corrosion will aggravate metal loss of both copper and steel.
The unique nature of the OptiFilm non-nitrogen filming inhibitor in Steamate FM1000 offers many advantages versus both traditional filming amines, as well as neutralizing amine technologies.
OPTIFILM BENEFITS VERSUS CONVENTIONAL FILMING AMINE TECHNOLOGY:
- Eliminates gunking and fouling, even at the higher feedrates required under severely corrosive conditions
- Makes feeding easier – lower viscosity than traditional filming amines
- Reduces handling and applications costs – can be fed undiluted
- Provides superior corrosion protection, even at low pH levels
- Is compatible with automated feed systems
OPTIFILM BENEFITS VERSUS NEUTRALIZING
AMINE TECHNOLOGY:
- Reduces treatment costs in systems with high alkalinity feedwater
- Protects against carbon dioxide, oxygen, and erosion-corrosion with a single product
- Controls corrosion over a broad pH range (5.5 – 8.5)
- Protects effectively, even with minor variations or interruptions in treatment feed
Treatment and Feeding Requirements
Proper treatment levels for Steamate FM1000 depend on many factors specific to a particular application.
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These include carbon dioxide and dissolved oxygen levels in the steam, system design, and operating conditions. The product is to be applied in accordance with the control procedures that Veolia establishes for a particular application.
Steamate FM1000 is designed to be significantly easier to feed than conventional filming amine formulations. The following general feed system guidelines apply:
Feed Point – Steamate FM1000 must be fed directly to the steam line or header.
Dilution – Steamate FM1000 may be fed neat or diluted to any convenient strength with condensate or demineralized quality water. Due to the requirement for steam phase injection, the dilution water must not contain appreciable levels of dissolved solids.
Materials Compatibility – Steamate FM1000 is compatible with stainless steel, leaded brass, crosslinked polyethylene, and PVC. It is also compatible with both EPDM (Ethylene-Propylene-Diene- Monomer) and Viton as gasket materials. It is not compatible with low carbon steel.
PaceSetter* Compatibility – Steamate FM1000 is fully compatible with the PaceSetter and PaceSetter Plus* feed systems. The product should be fed based on steam production.
Steamate FM1000 is available in a variety of customized containers and delivery methods.
- Store Steamate FM1000 at moderate temperatures and protect from freezing
- If frozen, warm gently until completely liquefied, and mix thoroughly before use
- A heater package is required with outdoor sitting of bulk storage tanks
- A re-circulation package is required for bulk storage
A Material Safety Data Sheet containing detailed information about this product is available upon request.
*Trademark of Veolia; may be registered in one or more countries. ©2022 Veolia. All rights reserved.
