32 results about "Copper test" patented technology

The invention discloses a measurement method of the corrosiveness of an electronic and electrical appliance service environment. The measurement method comprises the following steps: placing a copper test piece into the measured electronic and electrical appliance service environment, reducing a corrosive product film on the surface of the copper test piece through a cathode reducing method, then calculating the average thickness TCuO2 of a Cu2O corrosion product, the average thickness TCuO of a CuO corrosion product and the average thickness TCu2S of a Cu2S corrosion product, and finally calculating the total thickness average value Te, serving as a measurement result, of a surface corrosion product to acquire the corrosiveness of the measured electronic and electrical appliance service environment. Therefore, the measurement method can accurately measure the weak corrosiveness of the electronic and electrical appliance service environment under a condition of not affecting the electronic and electrical appliance service environment, so that the problem of low measurement precision caused by the adoption of a copper hanging piece weight loss method for calculating the corrosion rate in the prior art is solved.

The invention belongs to the technical field of medicine synthesis. The invention discloses a preparation method of DL-p-thiamphenicyl phenylserine ester. DL-p-thiamphenicol phenylserine ester is prepared by reacting L-p-thiamphenicol phenylserine ester or its salt, specifically comprising two Method, one, L-p-thiamphenyl phenylserine ester or its salt is directly produced after racemization DL-p-thiamphenicol phenylserine ester, the second, L-p-thiamphenicyl phenylserine ester or its salt After lye racemization and saponification, DL-p-thiamphenyl phenylserine or salt is obtained, and then copper reagent is used to obtain D-p-thiamphenyl phenylserine copper, and finally esterified to obtain DL-p-thiamphenyl phenylserine Serine ester. The invention simplifies the existing production process of DL-p-thymphenylphenylserine ester, greatly improves the recovery efficiency; solves the complex recovery process of racemic copper salt in the existing process, reduces pollution, and is more conducive to industrial production.

The invention provides a weathering resistant steel research and development method based on rapid corrosion data acquisition, and belongs to the technical field of weathering resistant steel researchand development. The method comprises the following steps of firstly, laminating and fixing the weathering resistant steel to be evaluated, a copper test piece and an insulating piece according to the sequence of "copper test piece-insulating piece-weathering resistant steel test piece-insulating piece-copper test piece", and manufacturing an electrode; then connecting a weathering resistant steel test piece in the electrode to the negative electrode of a micro-current meter by using a low-resistivity lead; connecting the copper test piece in the electrode to the positive electrode of the micro-current meter after being connected in parallel by using the low-resistivity lead; placing the electrode outdoors for corrosion test; and extracting the data of the micro-current meter after a period of time, and obtaining a corrosion development rule curve of the weathering resistant steel to be evaluated in outdoor service. By comparing the corrosion development rule curves of different weathering resistant steel, the corrosion resistance of the weathering resistant steel can be rapidly evaluated. The weathering resistant steel research and development method based on rapid corrosion dataacquisition has short test time and true and reliable test result.

The invention discloses a method for forming an amino acid self-assembly corrosion inhibition membrane with fluorescent characteristics on a copper surface, which comprises the following steps of: polishing pure copper step by step by metallographical sand paper from No.1 to No.6, degreasing with absolute ethyl alcohol and cleaning with deionized water for later use; processing a copper test specimen by using aqueous solution of amino acid to obtain the copper test specimen modified by the amino acid; and assembling fluorescent reagent onto the surface of the copper test specimen indirectly under the electrostatic attraction action between 1-naphthylamine sodium diacetate (NADA) serving as the fluorescent reagent and the amino acid to prepare a dual-layer photosensitive corrosion inhibition self-assembly corrosion inhibition functional membrane, and characterizing the fluorescent characteristics and corrosion inhibition effect of the membrane respectively by adopting fluorescence spectra and an electrochemic impedance method. Researches show that in the corrosion inhibition functional membrane with the fluorescent characteristics, the relevance exists between fluorescence intensity and corrosion inhibition performance, and the corrosion inhibition characteristics of the assembly membrane are subjected to on-line detection and real-time monitoring through a fluorescence signal, so the method has great significance for promoting the application of the amino acid self-assembly membrane.

The invention discloses a method for connecting copper / steel composite materials with preset joints. The specific operation steps are as follows: Step 1: preparation of copper-steel preset joints: using arc additive technology to prepare copper-steel composite welds of reasonable specifications, as Preset joint; Step 2: According to the composition of the base metal, select the solid welding wire of the same composition, and use MIG welding to complete the welding of the copper test plate, the steel test plate and the copper-steel preset joint. The method of the invention can improve the welding quality and comprehensive mechanical properties of the copper-steel dissimilar metal welded joint, and provides a new idea for the connection of copper / steel dissimilar metals.

The invention provides a test device and a corresponding test method for simulating corrosion of a hollow copper conductor of a generator in inner cooling water. The provided test device is characterized by comprising a kettle body, a kettle lid closely covering the kettle body, a wide-mouth glass bottle arranged in the kettle body and used for accommodating demineralized water, a gas inlet part, a gas outlet part, a test piece suspending part and a temperature control part, wherein the gas inlet part comprises a short gas inlet pipe arranged on the kettle lid and a soft polyethylene extending pipe, the upper end of the soft polyethylene extending pipe is connected with a bottom outlet of the short gas inlet pipe, and the lower end of the soft polyethylene extending pipe extends into the wide-mouth glass bottle; the gas outlet part is arranged on the kettle lid and used for exhausting gas; the test piece suspending part comprises a mounting part mounted on the inner surface of the kettle lid and a suspending line for suspending a copper test piece in a proper position in the wide-mouth glass bottle; the temperature control part comprises a thermocouple component which is inserted into the kettle lid and extends into the kettle body, a polyethylene outer sleeve sleeving upper and lower end sealing ports of the thermocouple component as well as a temperature adjuster connected with the thermocouple component.