A method for inhibiting microbial corrosion of metal material pipelines

Abstract

The invention relates to the technical field of novel functional materials, and discloses a method for restraining microbiological corrosion of a metal pipeline. The method for restraining microbiological corrosion of the metal pipeline comprises the steps that silicon nitride and cerium oxide are prepared into a compact rare-earth hybrid nano silicon nitride sheet material through a hydrothermalsynthesis method; then, the compact rare-earth hybrid nano silicon nitride sheet material is mixed with graphene to prepare a hydrophobic rare-earth hybrid nano silicon nitride-graphene composite material with high dispersibility; and afterwards, surface functional modification is conducted on the surface of the hydrophobic rare-earth hybrid nano silicon nitride-graphene composite material to further prepare an anti-microbial and anti-corrosive material which is added into epoxy resin to prepare anti-corrosive coating, and the anti-corrosive coating is smeared on the surface of the metal pipeline. According to the method, the preparation cost is low, and the material performance is outstanding; the material has the characteristics of being capable of disturbing the vital activity of microorganisms and the formation of metabolites and restraining the growth of the microorganisms such as bacteria, nano-particles in the material can directly catalyze and degrade hydrogen sulfide gas generated by catabolism to further prevent hydrogen evolutional corrosion, and the material has a good effect on preventing microbiological corrosion of the metal pipeline.

Description

technical field [0001] The invention belongs to the technical field of new functional materials, and in particular relates to a method for inhibiting microbial corrosion of metal material pipelines. Background technique [0002] Microbial corrosion refers to the corrosion caused by microorganisms or the corrosion caused by the influence of microorganisms. Microbial corrosion is a kind of electrochemical corrosion, the difference is that some physical and chemical properties of the interface in contact with it are changed due to the reproduction and metabolism of corrosion microorganisms in the medium. The secretion of intermediate products and / or final products of microbial cell metabolism and exozymes can cause material failure. It is customary to divide bacterial corrosion into anaerobic corrosion and aerobic corrosion. In fact, in the biofilm and bacterial population, a variety of fungi coexist together, and aerobic corrosion also occurs while anaerobic corrosion occurs....

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Problems solved by technology

In the prior art, represented by a kind of anticorrosion coating for seawater pipeline disclosed by the patent publication number CN109321043A and its preparation method, the coating film-forming substance has poor hydrophobicity, general adhesion on the pipeline surface, and poor impact resistance. The antibacterial agent used is modified nano-titanium dioxide, but its dispersion in the coating is general, the photocatalytic reaction time is short, and it is prone to side effects (the elemental sulfur produced by degradation will deactivate titanium dioxide particles). The efficiency of adsorption and photolysis is not high, and it needs to use luminescent materials to achieve the degradation effect. There are generally problems of insufficient antibacterial strength and poor stability. After the anti-corrosion coating, there will still be problems of coating failure and short anti-corrosion life, which will seriously affect the sewage discharge effect, and even cause pipeline leakage and rupture, resulting in great economic losses and waste of resources

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