Abstract
The methods for ensuring long-term and safe operation of marine equipment due to comprehensive repair technologies that use epoxy oligomers and new compositions based on them are developed. The influence of temperature and UltraSonic Treatment (UST) on the rheological properties of the pure epoxy matrix and compositions based on it is explored. The compositions have different content of nanodispersed soot carbon black of brand PowCarbon 2419G (particle size of 24 ± 2 nm). It is established that when nanoparticle soot (q = 0.10…15.00 pts wt) is introduced into the composition of the epoxy matrix treated with ultrasound, the viscosity of the composition increases gradually. Based on the results obtained, temperature ranges are recommended, in which the viscosity of the studied compositions reaches optimal technological parameters for the effective impregnation of threads, tows and various fabrics, and which provide for the effective application of the composition to the working surfaces of marine equipment. Technical recommendations are given for applying the developed black-filled epoxy compositions to the working surfaces of parts, ship mechanisms and pipeline systems of marine vessels.
Highlights
The globalization of international trade, in particular, the free movement of goods is impossible without sea transport with an enhanced operational reliability (Emi et al 1993; Hellio, Yebra 2009)
It is established that when nanoparticle soot (q = 0.10...15.00 pts wt) is introduced into the composition of the epoxy matrix treated with ultrasound, the viscosity of the composition increases gradually
Polymer-Composite Materials (PCMs) are used for the repair and maintenance of marine equipment (Najafi et al 2019; Selim et al 2017). They allow enhancing the durability of marine equipment and protecting the working surfaces of marine equipment exposed to such environmental factors as sea water, precipitation, solar radiation, and a variety of mechanical loads during storms
Summary
The globalization of international trade, in particular, the free movement of goods is impossible without sea transport with an enhanced operational reliability (Emi et al 1993; Hellio, Yebra 2009). It is known that the technical operation of marine vessels involves a number of technological processes (Soares et al 2009; Abbas, Shafiee 2020; Gudze, Melchers 2008), such as technical use (ensuring the vessel operation), maintenance (maintaining the vessel in proper (working) condition), repair (restoration of good technical condition). The existing methods of non-destructive testing of the marine equipment do not allow for a full control over the defect and damage accumulation process This applies to the early stage, when the identification and elimination of defects allows restoring the full efficiency of the mechanism (Emi et al 1993; Davies 2016; Najafi et al 2019). Polymer composites are easy to apply, which allows you to quickly create an even, monolithic coating (Mardare, Benea 2017)
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