Pipelines move nearly 75% of the oil transported worldwide annually since they are efficient and environmentally friendly compared to other transportation means. Erosion and corrosion of the oil and gas pipelines are serious problems that lead to disastrous failure and damage to life and the environment. The global cost of such failure is in the billions of dollars annually. Therefore, there is an increased need for the development of strategies to combat such failure. Superior protective coatings, including electroless one, are the common method for protecting oil and gas pipeline steels for their unique combination of properties such as wear resistance, corrosion resistance, and higher hardness. In this talk, we will present the synthesis and characterization of novel electroless NiP-TiNi nanocomposite coatings on API X100 steel surfaces from an acidic electroless NiP plating solutions containing different concentrations of TiNi nanoparticles. The morphology, thickness and elemental composition for the nanocomposite coatings investigated by scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy will be presented. The nanocomposite coatings were heat-treated at 400 <sup>o</sup>C for 1 hour. The phase structure, roughness and hydrophobicity of the as-plated and heat-treated coatings using X-ray diffraction, atomic force microscopy and contact angle measurements, respectively, were investigated. Effect of TiNi nanoparticles composition on the micro-hardness and corrosion resistance of the as-deposited and the heat-treated coatings will be also presented. The results indicated that the TiNi nanoparticles are distributed uniformly in the NiP matrix. The corrosion resistance and micro-hardness of the NiP-TiNi coatings were greatly enhanced after incorporation of the TiNi nanoparticles and even further improved by annealing at 400 oC for 1 hour, as shown in the enclosed Figure. The wear and anti-fouling characteristics of the coatings will be also discussed.

Novel NiP-TiNi nanocomposite coatings for harsh oil and gas environments made by the electroless technology

2019 Spring National Meeting

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