Abstract:

The cleaning method of carbon deposition has the shortcoming of low efficiency and poor quality in the remanufacturing cleaning of the automobile engine. In order to solve the problem, the forming process of carbon deposition is analyzed from microscopic aspect, to explore the suitable cleaning method based on its feature. The morphology of the surface and section of the carbon deposition is observed by scanning electron microscopy, to analyze its hierarchical structure and carbon particles combination features. The characteristic of particles’ bond energy is analyzed by using Infrared spectrum and Raman spectra. And combined with spectrum analyzes the composition of carbon deposition, to verify the chemical reaction and adhesion process in the formation process of the carbon deposition. And the formation process of carbon deposition is confirmed furtherly through the molten salt cleaning process experiment of carbon deposition. The main formation process of carbon is analyzed from microscopic aspect, it is concluded the forming reason and forming process in high temperature and pressure of carbon deposition particles, and the formation process of colloid and asphalt layer are stated, and the difficult cleaned reason of carbon is analyzed, to provide a selection basis for the appropriate cleaning method.

Key words: formation mechanism, morphology, spectra analysis, spectra analysis, carbon deposition