Inorganic Zinc Silicate Shop Primer XH4002

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Product Description

A two-component inorganic zinc silicate coating composed of ethyl silicate, solvent, zinc dust, fillers and additives. The product is a fast-drying, weldable, two-component inorganic zinc silicate shop primer suitable for manual and automatic spray systems, meeting the high-productivity production lines of advanced cutting and welding processes. It is a temporary protective primer for application before the prefabrication of steel structures, and may be overcoated with a range of high-performance coatings.

Product Characteristics

• Good cathodic protection
• Good anti-corrosion and recoat properties
• Excellent adhesion, impact resistance and abrasion resistance
• Fast drying

Basic physical and chemical data

Application parameters

Application Methods

*For automatic spray lines, use XH9424W in cold seasons and XH9424M in hot seasons. *For anti-corrosion work, use XH9424S in all weather.

Theoretical Spreading Rate

*Dries quickly, making timely accurate wet film thickness measurement impossible.

Application data (typical dry film thickness 20 µm, 65% relative humidity):

*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 contamination. Before application, all surfaces shall be assessed and prepared in accordance with ISO 8504:2000. Blast clean to Sa2½ with a surface profile of 30–70 µm. Before derusting, remove all oil, grease and weld spatter, and grind welds and sharp edges. Where the coating film has suffered mechanical damage with localised rusting, spot blast to Sa2½ or power-tool clean to St3 before local repair of the primer. If the old film shows chalking or zinc salts, remove the zinc salts and contamination before applying other primers, intermediate coats or topcoats.

Precautions

1. During application, ensure good ventilation and exhaust, keep away from ignition sources, and wear a mask, gloves and other protective equipment; adequate ventilation shall also be maintained during curing. 2. When mixing, first stir the base thoroughly, then add the curing agent in the specified ratio and mix uniformly; adjust the thinner amount according to application requirements and temperature changes, mix thoroughly, strain through a 120-mesh sieve before use, and stir continuously during use. 3. Strictly control application to achieve the recommended film thickness (15–20 µm, measured according to GB/T 6747-2008) for satisfactory cutting efficiency and welding performance. A thicker film provides longer protection, but affects welding, cutting and machining properties. In most environments, a 25 µm film provides a protection period of 6 months. Over-thick application may cause cracking; therefore the product is not recommended as a general-purpose inorganic zinc silicate anticorrosive primer. An over-thick film increases fumes during cutting and welding and reduces welding quality and cutting efficiency. The product is preferably applied with automatic equipment; if manual spraying is required, avoid dry spray and over-thick application. 4. The product is suitable only for application over blast-cleaned steel surfaces. 5. During application and curing, the substrate temperature shall be above 5 °C and at least 3 °C above the dew point, and the relative humidity shall not exceed 85%. Temperature and relative humidity shall be measured on the substrate close to the work area. A steel temperature of 30–40 °C is recommended, with good ventilation and a relative humidity not below 60%. If the humidity is below 60% during application, water misting is recommended, and the degree of cure shall be assessed to at least rating 4 according to ASTM D4752 before overcoating. 6. Cutting structures coated with this coating produces fumes; appropriate protection shall be taken. 7. When work is interrupted, do not leave paint in hoses, spray guns or spray equipment. Flush all equipment thoroughly with thinner. If work is interrupted for too long, remix a fresh batch of paint before resuming. 8. All equipment shall be cleaned with thinner immediately after use. Periodically flushing spray equipment during the daily work is good practice. The frequency of cleaning depends on the quantity sprayed, temperature, spraying time and interruptions. 9. Remaining paint and empty cans shall be disposed of in accordance with relevant local regulations.

Packaging

Storage

Keep sealed in a ventilated, cool, dry place away from sources of ignition. Minimum 9 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.