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2 results about "Galvanic anode" patented technology
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A galvanic anode is the main component of a galvanic cathodic protection (CP) system used to protect buried or submerged metal structures from corrosion. They are made from a metal alloy with a more "active" voltage (more negative reduction potential / more positive electrochemical potential) than the metal of the structure. The difference in potential between the two metals means that the galvanic anode corrodes, so that the anode material is consumed in preference to the structure.
Galvanic corrosion risk assessment method and device for dissimilar metal lap joint structure
PendingCN121595435AWeather/light/corrosion resistanceChemical processes analysis/designGalvanic anodeAviation
The invention discloses a galvanic corrosion risk assessment method and device for a dissimilar metal lap joint structure, and relates to the technical field of corrosion protection, and the method comprises the steps: obtaining standard polarization curves of a plurality of metal materials for the power system design of aviation equipment, so as to form a polarization curve library; determining a first metal material and a second metal material which form the to-be-evaluated dissimilar metal lap joint structure; acquiring a first standard polarization curve of the first metal material and a second standard polarization curve of the second metal material from a polarization curve library to determine the standard galvanic corrosion current density of the lap joint structure of the galvanic anode metal material and the dissimilar metal to be evaluated; determining a target corrosion rate of the galvanic couple anode metal material; and based on the target corrosion rate, determining a galvanic corrosion risk assessment result of the to-be-assessed dissimilar metal lap joint structure. The technical problem of low efficiency of a galvanic corrosion risk assessment mode in related technologies is solved, and the technical effect of improving the efficiency of galvanic corrosion risk assessment is achieved.
Owner:AECC HUNAN AVIATION POWERPLANT RES INST
Method and device for evaluating galvanic effect of multi-metal system based on critical dimension of galvanic couple
The application discloses a kind of based on galvanic critical dimension of multi-metal system galvanic effect evaluation method and device, and it is related to electrochemical corrosion evaluation technical field.Multi-metal system galvanic effect evaluation method includes steps: obtaining the polarization curve and self-corrosion potential of each metal in multi-metal system, determine galvanic anode and galvanic cathode on each lap surface;Calculate the galvanic critical dimension of any two groups of metals in multi-metal system;Compare the size of actual interface distance and combined critical distance, determine the galvanic corrosion form of multi-metal system;If the galvanic of two lap surfaces has no mutual influence, then carry out independent galvanic analysis, if the galvanic of two lap surfaces exists potential competition, then carry out coupling analysis to the galvanic of two lap surfaces.The application fully considers the complex potential coupling, interface interference and mutual influence effect between multi-metals, and improves the accuracy, applicability and scientificity of multi-metal lap joint structure galvanic corrosion evaluation.
Owner:SUN YAT SEN UNIV