White fused alumina WFA in improving the high temperature resistance of coatings
First of all, white fused alumina WFA is made of high-quality aluminum oxide powder as raw material, which is refined and crystallized by electric melting. It has high hardness, high purity, good self-sharpening, acid and alkali corrosion resistance, high temperature resistance, stable thermal performance, slightly lower toughness, high purity, good self-sharpening, strong grinding ability, low heat generation, high efficiency, acid and alkali corrosion resistance, and good high temperature thermal stability.
As a high-performance refractory material, white fused alumina WFA has the following core roles in improving the high temperature resistance of coatings:
1. High temperature stability and deformation resistance
High melting point characteristics: The melting point of white fused alumina WFA reaches 2050°C, which maintains physical and chemical stability at high temperatures, effectively prevents the coating from melting or deformation, and ensures the integrity of the coating in abnormal temperature environments.
Stable thermal performance: Its crystal structure is not easy to change volume at high temperatures, which can reduce the thermal expansion coefficient of the coating and reduce the risk of coating cracking caused by sudden temperature changes.
2. Coating structure optimization
Densification filling: White fused alumina WFA powder significantly improves the density and volume strength of the coating by filling the pores of the coating, reduces the apparent porosity, and forms a dense barrier to block high-temperature penetration.
Interface bonding strengthening: It is closely combined with the base material to form a uniformly distributed refractory layer, enhance the coating’s ability to resist thermal shock, and delay structural degradation in high-temperature environments.
3. Auxiliary thermal management function
Thermal conductivity regulation: White fused alumina WFA can improve the thermal conductivity of the coating, promote uniform heat diffusion, and avoid coating failure caused by local overheating.
Improved thermal shock resistance: By enhancing the toughness of the material, the accumulation of fatigue damage under high-temperature cyclic conditions is reduced, and the service life of the coating is extended.
4. Synergistic performance support
Corrosion resistance synergy: The high tolerance of white fused alumina WFA to acids and alkalis (chemical inertness) can synergistically enhance the comprehensive protection ability of the coating in high-temperature corrosive environments (such as industrial furnaces).
Enhanced wear resistance : The high hardness property (Mohs hardness 9.0) enables the coating to maintain surface integrity under high-temperature friction conditions, preventing mechanical damage from exacerbating high-temperature erosion .
Through the above multi-dimensional action mechanism, white fused alumina WFA has become a core additive to enhance the high-temperature resistance of industrial protective coatings (such as fire-retardant coatings for metallurgical equipment and petrochemical equipment), especially suitable for long-term stable protection needs in extreme environments above 1000°C.
Haixu Abrasives white fused alumina WFA sizes:
FEPA F16 F20 F22 F24 F30 F36 F46 F54 F60 F70 F80 F90 F100 F150 F180 F220 F230 F240 F280 F320 F360 F400 F500 F600 F800 F1000 F1200 F1500 F2000
JIS #16 #20 #24 #30 #36 #46 #54 #60 #70 #80 #90 #100 #120 #150 #180 #220 #240 #280 #320 #360 #400# #500 #600 #700 #800 #1000 #1200 #1500 #2000 #2500 #3000 #4000 #6000 #8000 #10000