AMERCOAT 90 HS phenolic epoxy cargo tank coating 90HS

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Key properties

• An economical tank special coating protection system requiring only two coats.
• For immersion service, withstanding continuous water temperatures up to 140 °F (60 °C)
• Recommended for use under thermal insulation, with heat resistance up to 400 °F (204 °C)
• Suitable for deionized water environments, withstanding water temperatures up to 140 °F (60 °C)

Colour and gloss

• White, off-white and pearl grey
• Flat

Basic parameters — at 20 °C (68 °F)

Parameters after mixing

Curing agent: at least 12 months; store in a dry and cool environment

Notes

• See supplementary parameters — recoat interval table
• See supplementary parameters table — curing time table
• For service above 250 °F (121 °C), the total dry film thickness of the system is limited to 10 mils (250 µm)

Recommended substrate condition and temperature

Bare steel

• Remove weld spatter, projections and undercut. Smooth welds per NACE RP-0178.
• Remove all oil, grease and any other contaminants to meet SSPC SP-1.
• Abrasive blast-clean with angular grit to at least SSPC SP-10, with a profile of 1.0–3.0 mils (25–75 µm).
• For some specific applications, Epoxy Filler 114 A can be used as a repair putty to fill small pits. Consult the PPG field technical service representative for fur

ther information on the chemical resistance of the coating.

• For immersion service, consult the PPG field technical representative to confirm the maximum allowable soluble salt residue on the surface before coating. It normally varies with the

chemical impurities in the water and the intended use.

Concrete substrate

• Prepare the surface per SSPC SP-13
• Abrade per ASTM D-4259 to remove the weathered layer and laitance and expose voids, producing a surface equivalent to at least 60-grit sandpaper

roughness.

• Perform the plastic sheet moisture test per ASTM D4263.
• If necessary, pores may be filled with Epoxy Filler 114A by putty-type filling.

Galvanised surfaces

• Oil or soap films may be removed with detergent or emulsion
• Per SSPC SP-16, lightly sweep blast with fine abrasive to a profile of 1.5–3.0 mils (38–75 µm). When

abrasive sweep blasting is not possible on site, a suitable conversion-type phosphating wash primer can be used for priming.

• For galvanized surfaces that have weathered outdoors for at least 12 months, first wash and clean to remove oil and soluble salts, then abrade to remove rust and

roughen the surface.

• The surface must meet the appropriate roughness requirement
• Before full application, a test patch is recommended to confirm compatibility and intercoat adhesion.
• For chromate-passivated galvanized surfaces, do not coat until the chromate has been completely removed by blasting, otherwise adhesion loss may occur.

Non-ferrous metals (non-magnetic) and stainless steel

• Per SSPC SP-16, abrasive blast to form a profile of 1.5–4.0 mils (37–100 µm) with suitable density and uniform peak-valley distri

bution. The hardness and grit size of the abrasive should be adjusted to the hardness of the substrate.

Substrate Temperature

• During application, keep the surface temperature between 50 °F (10 °C) and 122 °F (50 °C).
• During application, the substrate surface temperature shall be at least 5 °F (3 °C) above the dew point
• During application and curing, keep the ambient temperature between 50 °F (10 °C) and 122 °F (50 °C).
• During application, keep the relative humidity between 0% and 85% (for tank special coating, use dehumidifiers to control humidity at no more than 50%)

Coating system specification

• For tank special coating systems, a 2–3 coat system is recommended, with a dry film thickness of 10–15 mils (250–375 µm), plus ensuring welds and edges receive 2

stripe coats.

Instructions for use

Mixing ratio by volume: base : curing agent = 80 : 20

• First disperse-stir the base component in the container with an air-driven stirrer at medium speed until uniform, then, while stirring, slowly add

the curing agent component until it is all added, and continue stirring for 1–2 minutes to ensure the curing agent is thoroughly dispersed in the base component and a homogeneous state is reached.

• The hardener component may crystallize (become cloudy) and thicken at low temperature
• If this occurs, place the whole can in a warm room before mixing until it warms up and returns to a clear state.

Induction Time

Induction time after mixing

Above 70 °F (21 °C): not required

Application

• Mask off the application area to prevent airborne dust settlement and other contamination.
• Ensure continuous, adequate ventilation throughout application and curing
• During spray application, provide necessary shielding at draughty areas.
• Avoid contaminating the surface with combustion exhaust or allowing it to accumulate, to reduce amine blush and yellowing (toward amber) of light-coloured coatings.

Material temperature

During application and curing, the temperature shall be controlled between 50 °F (10 °C) and 90 °F (32 °C).

Air spray

• Conventional spray equipment

Airless spray (single-feed pump)

• A spray pump with a pressure ratio of at least 45:1

Brush/roller

• Use high-quality natural bristle brushes and/or solvent-resistant 3/8" short-nap rollers. Ensure the brush/roller is fully loaded with paint and free of entrapped air bubbles. For a thicker film,

apply in multiple passes.

• For tank special coating systems, except stripe coating and small local repairs, everything must be applied by spray.

Thinner quantity

If necessary, up to 5% by volume of thinner may be added

Supplementary parameters

Overcoating interval schedule for a 125 µm (5.0 mil) dry film thickness

Notes

• The drying time of the film depends on the ambient air and substrate surface temperatures, the film thickness, ventilation and relative humidity. The maximum overcoating interval is determined mainly by the actual surface temperature

rather than simply the ambient air temperature. The substrate surface temperature shall be monitored. The higher the substrate surface temperature, the shorter the maximum overcoating interval.

• The surface shall be clean and dry. All contamination shall be identified and removed. Pay particular attention to coatings directly exposed to weathering, which may show surface chalking. In such cases,

thorough cleaning is required; if in doubt, consult the PPG field technical service representative. If the specified maximum overcoating interval has been exceeded, abrading is required.

Curing schedule for a 125 µm (5.0 mil) dry film thickness

Pot life (at normal application viscosity)

Heat curing process

• For tank special coating systems, the final coat need only reach hard dry before heat curing at no more than 120 °F (49 °C).
• Do not heat cure before defects such as holidays are repaired (if specified)
• During heat curing, do not heat at a rate exceeding 2 °F (1.1 °C) per minute to reach the target temperature
• Monitor the surface temperature at different heights above the tank floor and in all main flow directions. The lowest surface temperature must meet the heating time and minimum temperature requirements of the heat curing specification

. Monitor and record all temperatures throughout.

• All adjacent and connected tanks must be completely empty, with no water or liquid.

Product certifications

• Complies with USDA requirements for incidental food contact
• Class A certified by the US National Fire Protection Association (NFPA), suitable for environments requiring low flame spread and low smoke
• Nuclear-grade Level 2 (ANSI N 5.12, ANSI N 101.2)

Safety Precautions

• For the coating and its recommended thinners, see Safety Sheets 1430 and 1431 and the relevant Material Safety Data Sheet
• This is a solvent-borne coating. Avoid inhaling spray mist and solvent vapours, and avoid contact of uncured paint with skin and eyes.

Worldwide

Although PPG Protective and Marine Coatings is committed to providing completely consistent products to users worldwide, from time to time it may be necessary to make minor adjustments to specific products to comply with local/national regulations or environmental requirements. In the following cases, use the corresponding alternative version of the product data sheet instead.

Reference information

• For the conversion table, refer to Information Sheet 1410
• For product data, refer to Information Sheet 1411
• For safety guidance, refer to Information Sheet 1430
• Safety and health in confined spaces | explosion hazard — toxic hazard: refer to Information Sheet 1431

Quality guarantee

PPG warrants (1) that it has good title to the product, (2) that the product quality conforms to the relevant technical quality specifications in force at the date of manufacture of the product, and (3) that the supplied product is free of lawful claims by third parties for infringement of US patent rights. The above warranties are limited to those given by PPG and other express or implied warranties required by applicable laws and regulations for transactions and commercial practice; any abuse contrary to the stated conditions, and any other warranty for special purposes or uses, are excluded, and PPG shall be free from liability. To claim under this warranty, the buyer must notify PPG in writing within five (5) days of discovering the quality defect, and the date must be within the product's valid storage period or within one (1) year from delivery of the product to the buyer.

If the buyer fails to notify PPG of the defect as required above, this will prejudice the buyer's right to obtain compensation under this warranty from PPG!

Limitation of liability

In all cases, PPG shall not be liable for any indirect, special, incidental or consequential loss of any kind arising from or in connection with the use of this product (whether based on negligence, strict liability or tort).

The information in this product data sheet is based on laboratory tests we believe to be reliable, and is provided for guidance only. PPG may revise this information at any time as experience accumulates and product development progresses.

All recommendations and advice concerning the use of this product, whether in technical documents, in response to an enquiry or otherwise, are given to the best of our knowledge and are believed to be reliable. Our products and related information are provided for industrial users possessing the necessary knowledge and practical skills, and it is the end user's responsibility to determine whether the product is suitable for the specific use. The buyer, having performed such evaluation, proceeds entirely at its own risk.

The quality and condition of the substrate on site, and the many other factors affecting product use and application, are beyond PPG's control. Therefore, PPG accepts no liability for any loss, injury or damage arising from the use of the information in this product data sheet (unless otherwise provided in a written agreement). Different application environments, changes to the application process or extrapolation of the reference data may result in failure to achieve the expected coating quality.

This product data sheet supersedes all previous versions. The buyer is responsible for confirming that the data sheet in hand is the latest version before using the product. The latest version is published on the official website of PPG Protective & Marine Coatings:

www.ppgpmc.com. In case of discrepancy between the Chinese version and the original English version of the product data sheet, the English original shall prevail.

Packaging: 1-gallon and 5-gallon drums

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