A testing device and method for infiltrating a material into high-temperature and high-pressure hydrogen are provided. The testing device includes a high-pressure cabin, internally including a sample to be tested; a hot oil-coated heating and insulation system, coating outside the high-pressure cabin to adjust and maintain a temperature in the high-pressure cabin; a hydrogen compressor, communicated with the high-pressure cabin to adjust a pressure in the high-pressure cabin; a vacuum pump, communicated with the high-pressure cabin to vacuumize the high-pressure cabin; a scavenging system, communicated with the high-pressure cabin to purge air impurities in the high-pressure cabin with an inert gas; and a controller, electrically connected with the hydrogen compressor, the vacuum pump, and the scavenging system, and configured to control actions of the hydrogen compressor, the vacuum pump, and the scavenging system.

A method for determining a median radius R.sub.0 of a collection of bubbles in a foamed medium, which liquid is suitable for being cured and to form, after curing, a solid construction material or a solid polymer foam, the method including conveying the foamed medium into a cavity, transmitting an ultrasound pulse into the cavity, detecting the pulse, measuring a component chosen from an amplitude of the detected pulse and a phase of the pulse, and subsequently determining the median radius Ro of the bubbles in the foamed medium in the cavity on the basis of the determined component.

The application provides a method, an apparatus and a device for evaluating a dynamic diffusion of natural hydrogen in rock pores. The method includes: performing, at a target pressure and a target temperature, a simulation calculation of a natural hydrogen adsorption based on a pre-constructed pore model of a rock to be evaluated, and determining an average number of hydrogen molecules adsorbed in the rock pores when the natural hydrogen is saturated at the target pressure and the target temperature; determining a natural hydrogen content, based on lithologic parameters, the average number of hydrogen molecules, the target pressure and the target temperature; adding one or more preset gases to the pre-constructed pore model, determining a loss content of the natural hydrogen, and determining a diffusion coefficient of the natural hydrogen; determining a diffusion evaluation parameter, based on the natural hydrogen content, the loss content and the diffusion coefficient.