Papers by Keyword: Ship Plate Steel

Abstract: It was compared AH36 opened plate using new techology with original plates using conventional method in the mechanical properties. Results showed: the mechanical properties of AH36 opened plate and plates of original plate are the same at the classification plate. The transverse tensile stength and yield strength of AH36 opened plate have an advantage over it’s longitudinal. The transverse elongation of AH36 opened plate and original plates are below the longitudinal. It is different the mechanical properties that is made of the deformation variance of AH36 opened plate and original plates in the transverse and the longitudinal.

Abstract: It was compared AH32 opened plate using new techology in the mechanical properties. Results showed: the mechanical properties of AH32 opened plate are the same at the classification plate. The transverse tensile stength and yield strength of AH32 opened plate have an advantage over it’s longitudinal. The transverse elongation of AH32 opened plate is below the longitudinal. It is different the mechanical properties that is made of the deformation variance of AH32 opened plate in the transverse and the longitudinal.

Abstract: To lay the foundation of the automation for line heating forming, a method for heating path generation and simulation for ship plate steel base on STL mode was proposed in this paper. The line heating path was generated by slicing the STL model of the steel plate using a series of planes, and the models of the heating equipment of ship plate steel were build, and the heating process of ship plate steel can be simulated by inputting the models of the heating equipment into the simulation system that was built by using VC++ and OpenGL. The case study shows that the method can primely solve the inconvenient of manual heating and the whole heating process can be observed by the simulation so that the heating process can be made a reasonable monitoring, and the heating path generation and simulation software are runs stably and reliably.

Abstract: The MIC behavior of the ship plate steel specimen with LaCl₃-Zn epoxy coating in the sulfate-reducing bacteria (SRB) solution was investigated in this paper. The variation of corrosion potential over time of different specimens in SRB solution show that the corrosion potential of the specimen with LaCl₃-Zn epoxy coating was obviously higher than the Zn-epoxy coating, suggesting that the LaCl₃-Zn epoxy coating may offer better protection. The variations of lgflg |Z|=4.5 and f_h with time show that the property of anti-infiltration and corrosion resistance of LaCl₃-Zn coating is much better than the ones of Zn-epoxy coating. Results also show that more sulfides and corrosion products of LaCl₃-Zn epoxy coating were produced which increased the shielding property of the coating. The experimental results of XRD and SEM are in good agreement with the ones of E_corr, and EIS, etc. They all show that the LaCl₃-Zn epoxy coating exhibits more favorable corrosion resistance property than the Zn-epoxy coating. It is obvious that coating the ship plate steel with LaCl₃-Zn epoxy is an effective and promising method against the attack of SRB in marine environment.

Abstract: The microbiological influenced corrosion (MIC) behaviors of the ship plate steel directly exposed in different medias (the sterile seawater, the ferrous bacteria solution and the sulfate-reducing bacteria solution) were investigated with electrochemical impedance spectroscopy (EIS), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and scanning electron microscopy (SEM). Corrosion potential, electrochemical impedance and micrographs of specimens under different experimental conditions were obtained. Results show that the FB and SRB in the marine environment affect the corrosion behavior of the ship plate steel greatly. The corrosion process in FB and SRB environment was controlled by both bacteria and corrosion products. The mechanism of MIC is discussed.