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The intention of the study is to explore potential field maintenance products with service temperature ranges of 0 to 65°C for patch application, including patch repairing and to provide corrosion protection for irregularly shaped components, such as fittings and electrical connection to pipe (e.g., cadweld). Viscoelastic materials were selected as potential candidates due to their inherent features of cold-flow capability, low water permeability, easy application (by hand and directly applied to surface), and compatibility with a variety of existing pipeline coatings.
The intention of the study is to explore potential field maintenance products with service temperature ranges of 0 to 65°C for patch application, including patch repairing and to provide corrosion protection for irregularly shaped components, such as fittings and electrical connection to pipe (e.g., cadweld). Viscoelastic materials were selected as potential candidates due to their inherent features of cold-flow capability, low water permeability, easy application (by hand and directly applied to surface), and compatibility with a variety of existing pipeline coatings. Phase 1 of the study on comparative evaluation of four viscoelastic materials showed that water absorption and cathodic disbondment of the viscoelastic materials vary from product to product. This paper focuses on phase 2 of the study. All investigations were carried out on a selected viscoelastic material from the phase 1 study. The aim of this study was to further explore if the selected material could fulfill its potential by comparing performance of the material in paste/mouldable compound and tape forms and determining a proper level of surface preparation that is not only efficient, cost-effective and practical for field patch application, but also provides the long-lasting performance. Ultimately, the insights into the consideration and selection of suitable viscoelastic materials for the intended applications are presented and a new approach for a viscoelastic patch system is proposed.
Most capital projects in the energy market face significant cost overrun issues. There is a real need for innovation to improve productivity; reduce the need for completion on site and to minimize the annual operations maintenance budget. By optimizing the coating specification, we can increase the likelihood of paint completion during the project while increasing productivity and quality.
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To address questions and concerns in the protective and marine coatings market, new laboratory data has been generated regarding corrosion rates and mechanisms that will help eliminate some of the assumptions regarding the role of soluble salts. These assumptions include soluble salt types such as chloride, sulfate, and nitrate along with the resulting conjugate corrosion products.
In this study, the effect on coating corrosion resistance after remediating an under-blasted then remediated to standard preparation is undertaken. In this work, it is proposed to under-blast one set of panels (~1 mil profile), blast to standard one set of panels (~3 mil profile) and remediate to standard a set of under-blasted panels (from ~1 mil profile to ~ 3 mil profile).