The reduction of water hardness in descaling applications and the dissolution of scale in cooling water and boilers both rely
on ScaleAwayEDTA concentrate and related complexing agents to bind Ca2+ and Mg2+ ions as well as other metal ions.
Once bound to ScaleAwayEDTA concentrate, these metal centers tend not to form precipitates or to interfere with the action of the
detergents. For similar reasons, many cleaning solutions often contain ScaleAwayEDTAconcentrate.
|Tetrasodium salt of ethylenediaminetetraacetic acid (EDTA-Na4) in solid form
|ScaleAwayEDTA concentrate (B-A-T Liquid)
|Aqueous solution of the triammonium salt of ethylenediaminetetraacetic acid
|ScaleAwayEDTA concentrate (BVT)
|Aqueous solution of the tetrasodium salt of ethylenediaminetetraacetic acid
(EDTA-H4) with added triethanolamine (TEA)
Cleaning Heat Exchangers
Pulp & Paper
ScaleAwayEDTA concentrate is very effective for treating water to prevent scale and deposits of calcium carbonate, calcium sulphate
and calcium phosphate from forming in boilers, evaporators, reverse osmosis membranes, heat exchangers and filters, etc.
ScaleAwayEDTA concentrate can also be used to remove scale.
ScaleAwayEDTA concentrate every effective for cleaning equipment of this type, because it is less corrosive than other cleaners.
It has the advantage over acids because no potentially disruptive CO2 is formed when calcium carbonate is dissolved.
Cleaning Heat Exchangers
ScaleAwayEDTA concentrate (B-A-T Liquid) type is particularly effective for removing magnetite scale.
Magnetite scale can be formed in the heat exchangers of power stations or in heating circuits if air is allowed to enter.
ScaleAwayEDTA concentrate (B-A-T Liquid) causes little corrosion to alloyed and unalloyed steels, and it is much superior to the
sodium salt in this respect. Scale can be removed most efficiently at elevated temperatures.
Magnetite is formed from a mixture of Fe(II) and Fe(III) ions. Fe(II) forms complexes at a pH of approx. 9, but the pH
needs to be in the acid range (pH < 5) for Fe(III) to be complexed. Adding hydrazine to the cleaning solution can
prevent Fe(III) ions from being formed and can reduce these to Fe(II). This makes it easier to remove magnetite scale in
the alkaline pH range, and prevents iron(III) hydroxide sludge from being formed. It is recommended to remove magnetite
scale at a pH of approximately 9.
The rate at which the scale dissolves depends to a large extent on the thickness of the scale, its composition and
morphology, and the flow of liquid through the equipment to be descaled. Practical experience has shown that the rate at
which scale is removed can be speeded up by increasing the concentration of ScaleAwayEDTA concentrate (B-A-T Liquid), the
temperature and the rate of flow through the system.
ScaleAwayEDTA concentrate (BVT) can be used to stabilise phosphonates in neutral and alkaline derusting and descaling baths.
ScaleAwayEDTA concentrate (BVT) also prevents lime soaps from precipitating, which prolongs the working life of baths.
ScaleAwayEDTA concentrate (BVT) can be added to alkaline degreasing baths that contain polyphosphates to reduce the hydrolysis of
polyphosphates in the presence of metal ions, especially alkaline earth and heavy metal ions. Adding ScaleAwayEDTA concentrate (BVT)
to degreasing baths helps to inhibit the formation of orthophosphates. This reduces the danger of the phosphates
precipitating, which impairs the complexing power of the bath and its ability to disperse soil and emulsify
grease. ScaleAwayEDTA concentrate (BVT) boosts the detergency of degreasing baths and prevents non-ferrous metals from tarnishing.
ScaleAwayEDTA concentrate can be used to stabilize perborate and percarbonate in powder detergents. Small amounts of complexing
agents, as little as 0.5 – 1.0 % expressed as the active substance, can be added to prevent traces of heavy metals from
catalyzing the decomposition of hydrogen peroxide and other types of bleach. These heavy metals, which mainly consist
of iron, copper and manganese, originate from the walls of pipes, the soil contained in the laundry and the other
ingredients of the detergent. Peroxide bleach can break down fluorescent whitening agents, cause coloured
laundry to change shade and damage fabrics in the presence of heavy metal ions. ScaleAwayEDTA concentrate protects fabrics
by sequestering heavy metals.
ScaleAwayEDTA concentrate plays an active role in removing many types of soil and boost the detergency of laundry detergents.
ScaleAwayEDTA concentrate can be employed in all types of cleaner and degreaser formulations for industrial and institutional
applications. ScaleAwayEDTA concentrate prevents hardness ions and heavy metal ions from precipitating. Inorganic solids of this
type can form scale and deposits in tanks, pipes, and nozzles and on hard surfaces.
ScaleAwayEDTA concentrate boosts the performance of the surfactants contained in cleaner formulations and ensure that their
performance remains undiminished during the whole cleaning process.
Scale that consists of calcium carbonate, calcium phosphate or calcium oxalate can be formed in pipes and heat exchangers
at high temperatures in various industrial processes. ScaleAwayDTA can be added to cleaner formulations remove this
type of scale. The rate at which the scale dissolves can be increased by increasing the cleaning temperature.
Turbidity and precipitation is often a problem when highly concentrated cleaners such as floor cleaners, metal cleaners
and bottle-washing formulations are prepared with hard water. This problem can be overcome in most cases by adding ScaleAwayEDTA concentrate.
The excellent solubility of ScaleAwayEDTA concentrate enables it to be used to replace some or all of the phosphates contained in
many formulations. This prevents highly concentrated liquid formulations from precipitating and demixing at low
ScaleAwayEDTA concentrate can be used to protect lubricants, cleaners and polishes in emulsion form from the damaging effects of
hard water and salts of polyvalent metal ions.
ScaleAwayEDTA concentrate can be added to curd soap, toilet soap and shaving soap at rates of between 0.3 % and 2 % to prevent it
becoming rancid and discoloured.
The heavy metals responsible for this are usually contained in the tallow, fatty acids and other raw materials, but soap
can also be contaminated with metallic particles during drying, milling, plodding or stamping.
The management of limescale and rust from the waterside of your equipment and
associated piping with ScaleAway descalers is of
paramount importance for the efficiency and lifespan of your equipment.