The design of aluminium–graphite metal matrix composites (MMCs) with advanced mechanical properties and high corrosion resistance is in demand for aerospace, transportation, and industrial applications. Breakthroughs in this field are limited due to the tendency of aluminium–graphite MMCs to corrode. In the present research, aluminium-based MMCs were produced by a relatively novel combined two-staged method. Multiwall carbon nanotubes (MWCNTs) were added into molten Al1070 and processed by high-pressure die casting followed by cyclic extrusion. For the composites produced by this method, it was previously demonstrated that mechanical properties are improved in comparison with pure aluminium alloys. In the current study, the manufactured Al–MWCNT composites were investigated by electrochemical tests (such as open circuit potential), potentiodynamic tests, linear polarization tests, and electrochemical impedance spectra to understand the corrosion resistance of the obtained composite material. The experimental testing of the corrosion resistance of Al–MWCNT MMCs showed that due to the advantages of the fabrication method, the addition of CNTs to aluminium does not cause a radical decrease of corrosion resistance.
Аннотация. Парниковый газ CO 2 образуется во всех технологических процессах черной металлургии. Выделены три типа эмиссий диоксида углерода различных переделов черной металлургии: процесса, транзитная и сквозная. Сквозная эмиссия диоксида углерода того или иного передела является суммой интегральных эмиссий процесса и транзитной. Предложена классификация переделов черной металлургии по механизму образования эмиссии диоксида углерода. Выделено пять типов переделов, к которым можно отнести нагревательные печи, конвертеры, мартеновские печи, доменные печи, коксовые батареи. Приведены значения сквозных эмиссий диоксида углерода для шести сочетаний переделов, на выходе которых получается сталь.
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