Mitigating External Corrosion of Pipelines Through Nano-Modified Cement-Based Coatings

Overview

Main Objective

This project consists of three main tasks. The first task will be to develop an effective processing technique to produce the cement-based coating, namely effective dispersion of the nanomaterials. This will be approached through physical and chemical methods: sonication and surfactant treatment, respectively. The second task will be to characterize key rheological properties of the coating material: thixotropic structural rebuilding and fresh-state adhesive properties. This will be done through a shear rheological "breakdown-recovery" protocol and the tack test, respectively. The last task will be to characterize key hardened properties: porosity and crack resistance under fatigue and restrained shrinkage. This will be done through monitoring weight loss, flexural testing under cyclic loading, and the ring test, respectively.

Public Abstract

External corrosion is a critical concern for pipelines, as it can lead to leakages and ruptures from which environmental, safety, and economic issues can arise. In the aim to mitigate external corrosion of pipelines, the proposed work will engineer a cement-based coating material that exhibits superior sealing properties and ease of implementation. The advantage of cement-based coatings over other types is that they can be designed to possess mechanical properties to provide structural stability for the pipeline, as well as offset buoyancy. To attain the properties desired for pipeline coating, the approach will involve utilization of nanomaterials and supplementary cementitious materials (SCMs), nvestigation of advanced processing techniques, and thorough characterization of key properties relevant to coating applications, i.e. rheology, porosity, dimensional stability, and crack resistance.

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