METHOD AND DEVICE FOR DETERMINING PROCESS OF CORROSION OF SAMPLES MADE OF STRUCTURAL ALLOYS IN HEAT-TRANSFER AGENT FLOW Russian patent published in 2005 - IPC

FIELD: measurement technology.

SUBSTANCE: ring-shaped samples are placed inside vertical ceramic cup. Cup is filled with heat-transfer agent which agent is subject to heating. Samples are tested during required period of time. Samples are subject to weighing before and after testing. Temperature of heat-transfer agent is hold above and under samples. Axial symmetric horizontal temperature differential is provided at the part between side surface of samples and wall of cup. After being heated the samples are subject to rotation in heat-transfer agent relatively longitudinal axis of cup. Temperature of heat-transfer agent interacting with samples is subject to inspection. Angular speed of rotation of samples is determined by ratio of ω=Rev/R², where Re is Reynolds number, ω is angular speed of rotation of sample, 1/s, R is outer radius of sample, m, v is kinematical viscosity factor, m²/s. Oxygen content in heat-transfer agent at sample test temperature is controlled by solid electrolyte sensor. Thickness of samples is measured before and after testing and distribution of components from surface to depth is determined by means of microscopic X-ray spectrometry. Device for determining process of corrosion is made in form of air-tight container having cylindrical side wall, cap and bottom. Glass with heat-transfer agent and samples is installed inside the container. Porous tube provided with capillary channel system is installed in center of cup along its vertical axis. Main cooler and top heater is connected to external surface of air-tight container. Top and lower rings are fixed horizontally in the center of cup. Rings are separated by porous tube pressed in its central part. Porous ring having holes in its top and bottom parts is placed in ring-shaped cavity formed by side wall of cup, top and lower rings and porous tube. Shaft is disposed along longitudinal axis of porous tube. Central part of the shaft is made in form of truncated cone directed with its smaller base up. Ring-shaped samples are set onto side surface of truncated cone. Porous disc is put onto top of cup. Test tubes with thermocouples are installed close to top part of side wall of cup and inside porous tube. Main cooler is connected to outer surface of side wall of air-tight container at the area of ring-shaped cavity. Top heater is installed above main cooler to form space. Lower heater is installed under bottom of air-tight container. Support ring is installed between lower ring and bottom of cup. Oxygen content ceramic sensor is placed in heat-transfer agent above top ring. Shaft, support ring, porous disc, porous ring, test tube, cup and porous tube are made of ceramics. As a variant of assembly, ring-shaped cavities can be filled with ceramic spheroids and granules.

EFFECT: reduced cost of testing; improved quality of results of testing.

4 cl, 1 dwg