Boiler systems and pipelines associated with power plants and
heating systems often face the problem of mineral scaling on the inner linings
and transmission bends. This is mainly due to the residual hardness of the
coolant water used. While treated water is essential, minute traces of
partially soluble salts of calcium, magnesium, strontium, as well as due to
silica and ferrous oxides. While scaling may lead to choking and rupture of
transmission pipes, oxidation due to unregulated pH of boiler feed water can
result in corrosion and pitting of metal. Thus various boiler scale removal chemicals are employed to clean and maintain
optimum operation efficacy of boiler systems.
The two primary choices include Ammoniated EDTA and Ammoniated Citric acid for cleaning. They are both weak organic acids and
remove mineral scales and oxides by oxidation and metal ion chelating. But as the
case with all metal-acid processes, acids often corrode and cause damage to
metal surfaces. And damaged/abraded inner linings of boiler pipes have a risk
of exploding at high water temperature and pressure. Thus appropriate acid
inhibitors are needed to limit the acid attack on base metal, therefore helping
check economic loss and ensure safety.
Rodine 2010 is by far the most popular choice as corrosion inhibitor for chemicals used in boiler
cleaning. It is a low toxicity, non-flammable, highly soluble low viscosity
liquid metal loss inhibitor for use in tetra ammoniated EDTA and tetra
ammoniated Citric acid cleaning solutions. Rodine 2010 not only minimizes ferrous
metal loss during chemical cleaning of power plant boilers but also effectively
prevents pitting and crevice corrosion of metal surface. Rodine 2010 has a
maximum operating temperature of 350°F when used with EDTA and 200°F when used
with Citric acid cleaning solution with an operational life of 24hours.
Laboratory testing has confirmed that it is more soluble than other commercial
inhibitors at elevated pH and advantageously permits post-oxidation and
dissolution of metallic copper deposits at significantly higher rates than
other commercial corrosion inhibitor chemicals.
ChemEqual serves as the largest online database
of chemicals and their equivalents and Rodine Acid Inhibitors from various global suppliers and
manufacturers can be found and enquired here.
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