Anti-Corrosion Material Solution for Chemical Corrosion Areas: Furan Resin Mortar

I. Material Overview

Furan resin mortar is a non-metallic anti-corrosion material formulated with furan resin as the binder, combined with corrosion-resistant fillers (such as quartz powder, diabase powder, graphite powder, etc.) and a curing agent. Renowned for its exceptional chemical corrosion resistance and high-temperature stability, it serves as a key protective material in industries like chemical processing, metallurgy, and non-ferrous smelting to combat harsh corrosive environments. It is particularly suitable for conditions involving alternating acid-base media corrosion.

II. Core Material Characteristics

1. Exceptional Chemical Corrosion Resistance

   • Broad-Spectrum Corrosion Resistance: The most prominent feature of furan resin mortar is its excellent resistance to a wide range of strong acids, strong alkalis, and organic solvents. It withstands various concentrations of non-oxidizing acids as well as alkaline media (e.g., sodium hydroxide, sodium carbonate).

   • Solvent Resistance: It exhibits good stability against most organic solvents, such as alcohols, ketones, hydrocarbons, and chlorinated hydrocarbons.

   • Oxidation Resistance: It also possesses certain tolerance to some weakly oxidizing media.

2. Outstanding Temperature Resistance

   • The cured furan resin mortar has a stable structure, with a heat resistance temperature significantly higher than common resins like epoxy and unsaturated polyester. Its long-term service temperature typically reaches 140°C–180°C, with even higher short-term tolerance. This allows it to maintain its physicochemical properties in high-temperature corrosive environments (e.g., reaction kettles, digesters, high-temperature pipeline linings) without softening, leaching, or degrading due to heat.

3. High Cross-Link Density and Structural Density

   • Furan resin forms a highly cross-linked three-dimensional network during curing. This structure results in a very dense cured body with low porosity, effectively blocking the penetration and diffusion of corrosive media and exhibiting extremely low permeability.

4. Excellent Physical and Mechanical Properties

   • It possesses high compressive strength and hardness, along with good wear resistance, enabling it to withstand material沖刷 and mechanical abrasion.

   • When bonded to suitable substrates (e.g., steel, concrete), it achieves strong adhesion, ensuring the integrity and effectiveness of the anti-corrosion lining layer.

5. Limitations (Considerations for Material Selection)

   • High Brittleness: The highly cross-linked structure also leads to insufficient toughness, high brittleness, and poor impact resistance, making it unsuitable for use alone in areas subject to severe impact or deformation.

   • Poor Resistance to Strong Oxidizing Acids: It has limited resistance to strong oxidizing acids such as nitric acid and chromic acid.

   • Relatively High Curing Shrinkage: It undergoes some shrinkage during curing, which must be accounted for in material design and lining structure.

III. Primary Application Areas

Based on the above characteristics, furan resin mortar is primarily used in equipment and areas within the chemical industry with extremely demanding anti-corrosion requirements, often serving as a lining material.

1. Acid-Base Reaction and Storage Equipment

   • Acid and alkali storage tanks and vessels of various specifications: Used as an inner lining anti-corrosion layer to prevent media corrosion on steel or concrete shells.

   • Reaction kettles, mixers, neutralization tanks: Applied for protecting the inner walls of containers where acid-base reactions occur, often accompanied by temperature fluctuations.

   • Electrolytic cells: Protects cell bodies from electrolyte erosion in environments like non-ferrous metallurgy and chlor-alkali industries.

2. Industrial Structures and Flooring

   • Floors, trenches, and equipment foundations in chemical workshops and plants: Laid with acid-resistant bricks or plates as anti-corrosion surfaces to resist corrosion from spilled acid, alkali, and salt solutions during production.

   • Ventilation ducts and scrubber inner walls: Protects against erosion from condensates containing corrosive gases.

3. Conveyance Pipelines and Chimneys

   • Industrial sewage pipelines and sewage pools: Lined for anti-corrosion to withstand complex industrial wastewater and chemical effluents.

   • Steel chimney and exhaust stack linings: Used in post-desulfurization systems or conditions involving acidic condensates to provide acid and temperature resistance.

IV. Summary

Furan resin mortar has established an irreplaceable position in the field of chemical anti-corrosion due to its broad-spectrum chemical resistance, excellent high-temperature performance, and dense structure. It is one of the preferred materials for addressing equipment corrosion challenges in high-temperature, alternating acid-base, and complex solvent environments. When selecting this material, its brittleness must be fully considered to ensure it is applied under suitable operating conditions, thereby providing a reliable and durable protective barrier for chemical production facilities.