THIN ORGANIC COATING (TOC) FOR GALVALUME

PRODUCT ADVANTAGES:

• Extraordinary corrosion resistance
• Excellent weather resistance
• Fingerprint resistance
• Good heat emissive properties
• Improves performance in roll forming
• Resists black staining/darkening during storage, transport & further processing of strip.

COMPOSITIONAL ASPECT OF SUTOC:

SUTOC is having the following major components: Chromium (VI) compound. Acrylic polymer emulsion in primary form. Proprietary additives.

PHYSICAL CHARACTERISTICS OF SUTOC:

• Appearance: Yellowish white emulsion.
• Sp. Gravity: 1.02 – 1.04
• pH: 7.0 – 8.0
• Chrome Pointage : 20 – 30 ml
• Solid content (%) (w/w): 30 ± 2 (Typical 30 %)

APPLICATION:

• Substrate: Galvalume
• Coating Chemical: SUTOC
• Concentration: No dilution, Ready to Use Solution
• Temperature of bath: Solution not required to be heated, preferable
• solution temperature range 10 – 40 degC
• Method of application: Roll Coater / Chem Coater
• Dry film coating weight: 2.0 – 4.0 g/m2 /both sides or 1.0 – 2.0 gm/m2 /sideDrying /Curing Condition: Preferably 85degC – 90degC (Peak metalTemperature)
• Applicator roll speed: 100 ± 10% of line speed Pick up roll speed: 50 ± 5% ofline speed

CONSUMPTION:

The consumption/coverage mainly depends on dry film thickness of the coating. Galvalume sheet assuming a coating weight of 2.8 gm/m2 (both sides).

SOLID COMTENT:

• Apparatus: Electronic analytical balance Petri Dish (10 cm dia), flat glass surface, height (1.5 – 2.0 cm)
• Reagents: Nil
• Method: Take around 5 g of sample into a Petri Dish and dry in oven at 120 degC for 1 hour.

Calculation:

• P2 – P1 % Dry solid = X 100 W1
• Where P1≡ Weight of Petri Dish
• P2≡ Weight of Petri Dish + Dry Sample ,W1≡ Weight of sample taken

COATING CHARACTERISTICS:

Coating Weight:

• A) Dry Film Coating Weight: 1.8–3.8 g/m2 /both sides or 0.9–1.9 g/m2 /side
• B) Chromium Layer Coating Weight (as Cr): 20–40 mg/m2 /both sides or 10–20 mg/m2 /side

Destructive Method: -

• Principle: The Dry Film Coating is removed by burning off at high temperature and the coating is measured by gravimetric method from the weight difference.
• Apparatus : i) Muffle Furnace
  ii) Electronic Analytical Balance
• Reagent: Nil
• Procedure: Cut four pieces of 2” X 2” panel from the sheet. Weigh the panels accurately in electronic analytical balance (at a time). Let the total weight be W1. Ignite the panels in Muffle Furnace at 420 degC – 430degC for 10 minutes. Cool the panels to room temperature. Weigh the ignited panels again all at a time. Let the total weight of the panels after ignition is W2.
• Calculation: Coating weight (gm/m2 /both sides) = (W1 – W2) x AREA

TYPICAL PERFORMANCE PROPERTIES:

Salt Spray ASTM B117 (≤5% white / black rust): 1000 hrs.

DISPOSAL

SUPLICK 99 is non haza rdous in natu re and it is bio -degra dable. The a cid used in the pickling line s hould be neutr alised with Caustic an d can be discharged by maintaining lo cal regula tion.

SAFETY

W ear rubber gloves, rubber apron, rubber boots, safety goggles and f ace shield when handling the chemical. Splashes on the skin should be washed -off with water

BEST BEF O RE END

1 year f rom the mo nth of manufacturing.

PACKING

20/50/200 kg HDPE container or as per the contract.