Abstract: The invention discloses a method for preparing an anticorrosive surface layer of a metal material in a marine environment by laser, which belongs to the technical field of laser processing. First, the laser cladding method is used to prepare a cladding surface layer on the surface of the metal material that is not easy to undergo chemical substitution reaction with the chlorides (NaCl, MgCl2 , CaCl2 etc.) in the seawater. Then, on the surface of the cladding surface layer, ultrafast laser processing is used to form a surface layer with a wetting angle (and water) greater than 90 degrees and with hydrophobic characteristics.

Abstract: The present disclosure relates to the technical field of composite coating preparation, in particular to a method for plasma-assisted and multi-step continuous preparation of a diffusion layer/amorphous carbon film composite coating and use thereof. In the present disclosure, a high-temperature plasma carburizing/nitriding technology and a low-temperature plasma carbon coating technology are combined by a plasma activation technology with argon ion under gradient cooling, and the surface of a material is activated by multiple bombardment on the surface of the material with high-energy argon ions. In this way, a cluster-like porous and loose structure on a surface of the diffusion layer is removed.

Abstract: A cleaning water supply device contains a mixing unit including a channel assembly and a circular valve member, wherein the channel assembly includes an inlet channel, an outlet channel, a through channel between the inlet and the outlet channels, and at least one intake communicating with the through channel; the valve member is installed in the through channel and includes a flexibly circular wing formed therein to abut against and close the through channel so that the intake is stopped communicating with the inlet channel and the outlet channel, and when the vacuum attraction generates in the through channel, the inlet and the outlet channels are opened; a storing unit connected with the channel assembly of the mixing unit and including a chamber to receive a cleaning fluid and an output tunnel communicating with the chamber and the intake.

Abstract: A cleaning water supply device contains a mixing unit including a channel assembly and a circular valve member, wherein the channel assembly includes an inlet channel, an outlet channel, a through channel between the inlet and the outlet channels, and at least one intake communicating with the through channel; the valve member is installed in the through channel and includes a flexibly circular wing formed therein to abut against and close the through channel so that the intake is stopped communicating with the inlet channel and the outlet channel, and when the vacuum attraction generates in the through channel, the inlet and the outlet channels are opened; a storing unit connected with the channel assembly of the mixing unit and including a chamber to receive a cleaning fluid and an output tunnel communicating with the chamber and the intake.