Silicone Heat-resistant Aluminium Coating XH7609

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Product Description

This product is composed of high-silicon-content silicone resin, heat-resistant pigments/fillers, aluminium powder, additives, solvent and accelerator. Long-term heat resistance 540 °C, short-term maximum heat resistance 600 °C. Suitable for temperature-resistant corrosion protection of high-temperature pipelines, equipment and exhaust devices in petrochemical plants, chemical plants, power plants and steel plants. Complies with HG/T 4565-2013.

Product Characteristics

• Long-term thermal stability at high temperatures
• Good thermal-oxidative anti-corrosion performance
• Excellent compatibility with other high-temperature primers
• Fast-drying performance

Basic physical and chemical data

Application parameters

Application Methods

*For long-term heat resistance above 400 °C, strictly control the film thickness during application.

Theoretical Spreading Rate

Application data (typical dry film thickness 30 µm)

*The maximum recoat interval depends on the exposure environment and the end use of the coating.

Surface Preparation

All surfaces to be coated shall be clean, dry and free from contaminants. Before coating, all surfaces shall be assessed and treated in accordance with ISO 8504:2000. This product may be applied directly to metal substrates prepared to Sa 2½ or St3, or over the recommended heat-resistant anticorrosive primer. When used over a heat-resistant primer, apply within the specified recoat interval; the primer surface shall be dry and free from any contaminants. When applied over other aged heat-resistant coatings, remove chalked layers, grease and other contaminants by a suitable method. Substrates of cracked, damaged and similar areas shall be prepared to Sa 2½ or St3, and the primer repaired before applying this product.

Precautions

1. During application, ensure ventilation and exhaust, keep away from sources of ignition, and wear protective equipment such as masks and gloves; adequate ventilation shall also be maintained during curing. 2. When mixing, first stir the paint thoroughly, add the curing agent per the ratio and stir thoroughly, then adjust the thinner quantity according to application needs and temperature changes, and stir well. Because the mixing ratio is large, use weighing equipment when mixing small quantities; a volume scale cannot accurately mix the paint by volume. 3. The coating cannot achieve ideal physical/mechanical properties before being heat post-cured, so handle with extra care to avoid damaging the coating. When the film is exposed to high temperature for a long time, slight discolouration and yellowing may occur. 4. Over-thick application or too-short recoat intervals seriously affect the drying/curing, heat resistance, recoatability and handling time. At a design maximum temperature of 400 °C, the maximum film thickness is 160 µm; at 450 °C, 90 µm; above 540 °C, the maximum film thickness shall not exceed 60 µm. 5. After long-term exposure of the coating, before recoating, ensure the old film surface is free from contaminants, and abrade the surface before applying the subsequent coat. 6. When applied over inorganic zinc silicate primer, ensure the primer is fully cured (MEK test at least Grade 4). 7. Thick films of this product must be thoroughly dried and cured for at least 7 days before being put into service; otherwise the incompletely cured coating cannot achieve good heat resistance, and even shows skinning and detachment during heating. 8. During application and curing, the substrate temperature must be above 5 °C and at least 3 °C above the dew point, and relative humidity shall not exceed 85%. Avoid application on surfaces above 40 °C, otherwise defects such as blistering and poor levelling tend to occur. 9. Cutting structures coated with this coating produces fumes; take appropriate protection. 10. When work is interrupted, do not leave coating in the paint line, spray gun or spray equipment. Flush all equipment thoroughly with thinner. If the interruption is too long, it is recommended to mix a fresh batch of paint for application. 11. Clean all equipment with thinner immediately after use. Periodically flushing spray equipment during the working day is good practice. The flushing frequency depends on the spray quantity, temperature and spray duration, including interruptions. 12. Dispose of leftover paint and empty cans in accordance with the relevant local regulations.

Packaging

Storage

Keep sealed in a ventilated, cool, dry place away from sources of ignition. Base minimum 12 months; accelerator 6 months.

Safety Precautions

1. For the coating and its recommended thinners, see the safety sheets and the safety data of the relevant materials. This is a solvent-borne coating; avoid inhaling spray mist and solvent vapours, and avoid exposing skin and eyes and contact with uncured paint as far as possible. 2. All work related to the application and use of this product must comply with the relevant national health, safety and environmental standards and regulations. 3. If welding or flame cutting is required on metal coated with this product, dust and fumes will be generated; use appropriate personal protective equipment and adequate local ventilation. 4. If in doubt about the suitability of this product, consult the company.

Scope of liability

The information provided in this product data sheet is based on laboratory test results that we consider accurate, and is provided for application guidance only. All recommendations and advice given by T&H on the use of T&H products, whether in technical documents, special consultation or otherwise, are based on information we consider most reliable. Our products and the information provided are intended for users with the necessary knowledge and industrial experience, and it is for these end users to determine whether the products are suitable for their use. T&H cannot control the quality and condition of the substrate, nor the various factors affecting the use of the product. Therefore, T&H accepts no liability for any loss, injury or damage arising from the use of our products or from reliance on this product data sheet (unless otherwise agreed in writing). Data in this product data sheet may be revised as necessary based on practical experience and continued product development.

Information is subject to the manufacturer's latest version; the manufacturer's latest TDS prevails.
The technical parameters on this page are taken from the product's original manufacturer technical datasheet, the copyright of which belongs to the manufacturer. If a rights holder considers the presentation inappropriate, contact us for verification and handling.