Fire safety polyimide composite coating for oil and gas pipeline protection
A polyimide-based protective coating for oil and gas pipeline protection was studied.Based on the synthetic polyimide coating,the mechanical strength,thermal stability,wear resistance and fire resistance of the coating were enhanced by introducing polyphosphazene functionalized boron nitride.The experimental results show that the tensile strength of the polyimide protective coating with the introduction of functional fillers is as high as 114.9 MPa,the initial decomposition temperature is over 500℃,and the carbon residue yield is as high as 65 wt%.Compared with the natural coating,the peak heat release rate of the composite coating is greatly reduced.The friction characterization test also confirmed that the wear resistance of the coating surface was significantly improved.The multifunctional polyimide composite coating with excellent comprehensive properties can be widely used in oil and gas pipeline safety protection engineering.
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