DESCALING LIQUID

 

APPLICATIONS

DESCALING LIQUID is suitable for removal of hardness scale and/or
iron oxides from boilers, condensers, evaporators, heat exchangers,
cooling systems etc. It must not be used on zinc, aluminum, galvanized
materials, cast iron and stainless steel.

DIRECTIONS FOR USE

Descaling can be accomplished by circulation. For large components
and systems, use in-situ soaking. For small components soak in
immersion bath. The most effective method is by circulation as it
ensures renewal of acid film in contact with the scale.


CIRCULATION METHOD


If deposits to be removed are covered with oil or grease, a degreasing
treatment with a solution of 2% to 8% of ALKACLEAN, CARBON
REMOVER, SEACLEAN with water should be carried out prior to
descaling. Circulate solution for 4 to 6 hours with a temperature of
60°C.

After degreasing, start descaling treatment with a solution of 10% to
20% DESCALING LIQUID with water. The solution should be circulated
for 24 to 36 hours for hardness scale, and 1 to 4 hours for iron oxide
scale, depending on nature and state of the deposits. Ensure circuit
is vented at the highest point to release gases produced during the
descaling treatment. Cleaning solution may be heated to increase the
descaling process rate. Do not exceed 40°C as chlorine gas may
be liberated above this temperature. Check the acid concentration
of the solution regularly. If it drops to less than 1/2 initial concentration,
regenerate the solution by adding more DESCALING LIQUID.
Determination of the acid concentration may be found using an
ACIDITY TEST KIT (obtainable from UNIMARINE)

The progress of operation may be followed by placing scale samples in
easily observed positions, When the samples are completely dissolved
and effervescence has stopped, circulate for one more hour then
drain system thoroughly. Rinse thoroughly with water then drain. To
neutralize any remaining traces of acid and to passivate the circuit,
circulate a 1% to 2% by weight solution of ALKALINITY CONTROL
until an acceptable pH value is obtained (normally needs 2 to 6 hour
circulation or soaking).


SOAKING METHOD

 

Procedure is similar to that for circulation, i.e. degreasing, descaling
(ensuring venting), rinsing and neutralizing. The same solution strengths
should be used. If the descaling solution can be agitated, this will help
to renew the acid film coming into contact with the scale

NATURE OF SPECIAL RISKS AND SAFETY ADVICE

In accordance with the latest EEC Council directives this product is subjected to:


R34 : Causes burns
R37 : Irritating to respiratory system
S2 : Keep out of reach of children
S26 : In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
S28 : After contact with skin wash immediately with plenty of water
S36/37/39 : Wear protective clothing, suitable gloves and eye / face protection
S45 : In case of accident or if you feel unwell, seek medical advice immediately (show the label if possible)

 

Heavy duty acid compound
containing descaling accelerators
and corrosion inhibitors


- Fast and efficient removal of scale and iron
oxides
- Contains descalant accelerator to increase
reactions
- Contains protective corrosion inhibitor
against attack on ferrous metals
- Highly concentrated product
- In-situ cleaning eliminates need for
extensive dismantling



PRODUCT CHARACTERISTICS

Appearance: clear liquid
Corrosive action: inhibited against attack on ferrous metals

Specific gravity: 1,15 (20°C)
Flash point: none
pH: <1

IMO Class: 8 / II
UN Number: 1789
ADR: 8.5b)