PPG SIGMASHIELD 880 ALU Abrasion-resistant Epoxy Coating 880 ALU

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Introduction

A two-component, high-solids, surface-tolerant micaceous iron oxide/aluminium-flake-reinforced epoxy primer.

Key properties

• Mainly an anticorrosive primer for harsh environments such as the splash and immersion zones of offshore projects.
• High seawater resistance.
• Excellent anti-corrosion properties.
• High abrasion and impact resistance.
• Continues to cure under immersion.
• Compatible with well-designed cathodic protection systems.
• Particularly suitable for protecting buried pipelines and steel structures in severely polluted industrial environments.
• Meets the pre-qualification requirements of Systems 7A, 7B and 7C of the Norwegian NORSOK M-501 standard, 6th edition.
• Certified to the international standard ISO 12944-9 for protective coating systems in splash and tidal zones (CX and Im4) and immersion zone (Im4).

Colour and gloss

• Yellow/green.
• Semi-gloss.

Basic data at 20 °C (68 °F)

Parameters after mixing

Maximum: 14 days.

Curing agent: at least 24 months; store in a dry and cool environment.

Notes

• See the supplementary data sheet — theoretical spreading rate versus dry film thickness table.
• See supplementary parameters — recoat interval table.
• See supplementary parameters table — curing time table.

Recommended substrate condition and temperature

Substrate condition

• The performance of the coating depends on the quality of surface preparation.
• Bare steel: blast cleaning to Sa2 or Sa2½ of ISO 8501-1.
• The surface roughness after blast cleaning is recommended to be 40–80 µm (1.6–3.1 mil).
• Bare steel: hand or power-tool cleaning is acceptable; St3 of ISO 8501-1 or SP3 of SSPC applies to new projects; St2 of ISO 8501-1 or

SP2 of SSPC applies to maintenance projects; UHPWH ultra-high-pressure water jetting to SSPC-VIS-4 WJ-2L/3L surface condition (light flash rust only) is also acceptable.

• For confirmed compatible previous coats: the surface shall be clean and dry, with all contamination removed.

Note: for immersion environments with water temperatures up to 90 °C/194 °F, abrasive blasting is required, meeting at least Sa 2½ of ISO 8501-1 (SP 10 of SSPC), with roughness 40–80 µm (1.6–3.1 mil).

Substrate Temperature

• During application, the substrate surface temperature must be maintained at least 3 °C (5 °F) above the dew point.

Instructions for use

Mixing ratio by volume: base : curing agent = 75:25 (3:1)

• The thinner should be added after the two components are mixed.
• If necessary, thin as appropriate, but do not exceed the specified ratio, to bring the application properties of the paint to the ideal state.
• Excessive thinning may reduce the sag resistance of the wet film and slow hard drying.

Induction Time

Not required.

Air spray

Airless spray (single-feed pump)

Brush/roller

Supplementary parameters

Film thickness and spreading rate

Overcoating interval schedule for dry film thickness up to 500 µm (20.0 mil)

Curing schedule for dry film thickness up to 500 µm (20 mil)

Notes

• For tidal-zone repair coating of dock breakwater elements and pipe piles, Abrasion-resistant Epoxy Primer 880 ALU may be immersed 30 hours after completion. The surface may show whitening as a result, but this does not affect

the anti-corrosion performance of the coating.

• The drying time of the coating depends on the dry film thickness after application and the ventilation during curing. Drying is usually slower at high film thickness and poor ventilation.
• A single application may also directly meet the requirement of a single-coat dry film thickness of 500–1000 µm (20.0–40.0 mil), but achieving the fully designed film strength therefore requires

a curing time extended by 2–2.5 times.

• During application and curing, ensure continuous, adequate ventilation (see Safety Sheet 1433 and Information Sheet 1434).

Pot life after mixing (at suitable application viscosity)

Product certifications

• The two-coat system is certified as meeting the requirements of System 7A of NORSOK M-501, 6th edition.
• The two-coat system formed in this way has passed the pre-qualification of the Norwegian NORSOK M-501 standard, 6th edition, for coating systems used in environments with temperatures up to 90 °C (194 °F),

and is likewise applicable to System 7B of the specification.

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 product data, refer to Information Sheet 1411.
• For safety guidance, refer to Information Sheet 1430.
• For safety and health in confined spaces and explosion hazard — toxic hazard, refer to Information Sheet 1431.
• For safe working in confined spaces, refer to Information Sheet 1433.
• For ventilation guidance, refer to Information Sheet 1434.

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.

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