Method for preparing geothermal water corrosion preventing nano chemical composite plated layer

A technology of chemical composite plating and geothermal water, applied in liquid chemical plating, coating, metal material coating process, etc. Dispersion is difficult and other problems, to achieve the effect of improving corrosion resistance, good corrosion resistance, excellent corrosion resistance

Inactive Publication Date: 2016-07-13
CHONGQING UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of a nano-chemical composite coating resistant to geothermal water corrosion, aiming at solving the problem that the binding force between the electroless plating and the substrate is not strong, the corrosion resistance of the coating is relatively short, an external current is required, and nanoparticles are dispersed. difficult question

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  • Method for preparing geothermal water corrosion preventing nano chemical composite plated layer
  • Method for preparing geothermal water corrosion preventing nano chemical composite plated layer
  • Method for preparing geothermal water corrosion preventing nano chemical composite plated layer

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preparation example Construction

[0035] Such as figure 1 As shown, the anti-geothermal water corrosion nano chemical composite coating preparation method of the embodiment of the present invention comprises the following steps:

[0036] (1) Stainless steel substrate pretreatment process for coating preparation

[0037] The cut surface has a dense oxide film. Because the existence of these bumps and oxide films will lead to poor deposition of the coating on the surface of the substrate, it needs to be pretreated to make it meet the basic conditions of electroless plating. Substrate pretreatment mainly needs to go through processes such as grinding, polishing, washing with metal cleaners, washing with distilled water, and drying. The sample base needs to go through three steps:

[0038] ① Grinding: The purpose is to remove the oxide film on the surface of the substrate and the uneven scratches around it. First use a wheel grinder combined with a diamond wheel to remove the burrs after cutting, then use a 24...

Embodiment 1

[0050] (1) Substrate pretreatment

[0051]Stainless steel substrate pretreatment mainly needs to go through grinding, polishing, metal cleaning agent washing and distilled water cleaning, drying and other processes. The sample base needs to go through three steps: ① Grinding: first use a wheel grinder combined with a diamond wheel to remove the burrs after cutting, then use a 240-mesh louver to grind the base to remove obvious protrusions and grooves, and then use a nylon wheel to grind Remove the obvious scratches when the emery wheel is polished, and achieve the effect of surface flatness and cleanliness. ② Polishing: During the polishing process, the polished metal substrate surface is polished with a wool grinding wheel and a green polishing paste, and the polishing speed is 3000r / min. Then the substrate was naturally cooled to room temperature. ③ Washing: First use gauze and metal cleaning agent to clean the polished surface to remove a large amount of surface dirt. Th...

Embodiment 2

[0057] (1) Substrate pretreatment

[0058] Stainless steel substrate pretreatment mainly needs to go through grinding, polishing, metal cleaning agent washing and distilled water cleaning, drying and other processes. The sample base needs to go through three steps: ① Grinding: first use a wheel grinder combined with a diamond wheel to remove the burrs after cutting, then use a 240-mesh louver to grind the base to remove obvious protrusions and grooves, and then use a nylon wheel to grind Remove the obvious scratches when the emery wheel is polished, and achieve the effect of surface flatness and cleanliness. ② Polishing: During the polishing process, the polished metal substrate surface is polished with a wool grinding wheel and a green polishing paste, and the polishing speed is 3000r / min. Then the substrate was naturally cooled to room temperature. ③ Washing: First use gauze and metal cleaning agent to clean the polished surface to remove a large amount of surface dirt. T...

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Abstract

The invention discloses a method for preparing a geothermal water corrosion preventing nano chemical composite plated layer. The method comprises the following steps: implementing a pre-treatment process for a stainless steel substrate prepared from a coating; preparing a basic plating liquid; adding nano ZrO2 granules; implementing a plating process; implementing a sintering process, drying a sample with the prepared coating in air naturally, placing in a muffle furnace, sintering, naturally cooling in the muffle furnace to the room temperature, and taking out, thereby obtaining the Ni-P-ZrO2 nano composite coating. The plated layer is good in corrosion prevention effect in a geothermal water medium, the metal coating is relatively good in flatness and uniform and compact and is tightly combined with substrate metal, furthermore the corrosion preventing metal can be adopted to prepare a corrosion preventing geothermal water pipeline, and the method is expected to effectively solve the problem that heat exchange equipment and pipelines in a geothermal energy resource system in China are corroded, and has remarkable improvement.

Description

technical field [0001] The invention belongs to the technical field of geothermal water anticorrosion, and in particular relates to a method for preparing a nanometer chemical composite coating resisting geothermal water corrosion. Background technique [0002] Geothermal resource is a widely distributed green energy, which has the advantages of low cost and direct utilization. However, due to the high temperature of geothermal water and the long-term movement inside the crust, the dissolution, ion exchange and analysis of rocks are strong, so it has a complex chemical composition. Among them, the scaling components mainly include Ca 2+ , Mg 2+ 、HCO 3- , SO 4 2- and SiO 2 . Corrosive components mainly include dissolved O 2 , SO 4 2- , Cl - 、H + , sulfide, etc., its erosion will cause severe corrosion and damage to the metal pipes and heat exchange surfaces in the system, resulting in an increase in equipment maintenance costs and a decline in economic benefits, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/36C23C18/18
CPCC23C18/1806C23C18/36
Inventor 蔡永伟李纲程治良全学军
Owner CHONGQING UNIV OF TECH
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