Preparation method of high-performance inorganic zinc-enriching long-acting anticorrosive coating
An inorganic zinc-rich, long-term anti-corrosion technology, applied in anti-corrosion coatings, fire-proof coatings, alkali metal silicate coatings, etc., can solve cracked coating defects, and the coating of inorganic zinc-rich primers is easy to crack and impact resistant Poor resistance and other problems, to achieve the effect of small ion hydration radius, strong reactivity and excellent wear resistance
Inactive Publication Date: 2016-03-30
QUANZHOU NAISI MATERIAL TECH
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AI Technical Summary
Problems solved by technology
[0011] 1. The zinc content in the coating of water-based inorganic zinc-rich anti-corrosion coating exceeds 70%, and the coating is relatively "brittle" and has poor impact resistance;
[0012] 2. The coating of inorganic zinc-rich primer is easy to crack, which will produce so-called cracked coating defects, etc.;
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0032] Preparation of film-forming base fluid :
[0033] Add sodium silicate solution (d=1.16-1.20, M=3.3-3.4) into deionized water to dilute the solution to 100 g. Then, a mixed solution of 15wt% hydrochloric acid aqueous solution and 3wt% boric acid aqueous solution and glacial acetic acid were added to the solution, and the film-forming base liquid sample was prepared after being stirred in a stirring tank for 10 minutes and fully mixed.
[0034] Adhesive preparation
[0035] At room temperature, various components for preparing lithium silicate were respectively added to the reaction kettle for fully stirring reaction. After stirring for 20 minutes, they were allowed to stand at room temperature for a period of time to react to obtain a lithium silicate solution sample. Then lithium silicate, silica sol and polyvinyl alcohol were put into the stirred tank again, stirred at room temperature for 60 min and then filtered to obtain a binder sample.
[0036] Preparation of I...
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Abstract
The invention relates to a preparation method of a high-performance inorganic zinc-enriching long-acting anticorrosive coating. The aqueous inorganic zinc-enriching anticorrosive coating is prepared from a film-forming base solution, a binding agent and 400-mesh spherical high-purity zinc powder, wherein the film-forming base solution is a sodium silicate solution treated by an inorganic acid; the binding agent is a lithium silicate binding agent; the aqueous inorganic zinc-enriching anticorrosive coating is characterized in that polyvinyl alcohol is added into the binding agent to be used as an auxiliary agent and the content of the polyvinyl alcohol is controlled to be 25wt%-40wt% of the mass of the binding agent; a preparation process of the coating is simple and the coating is convenient to coat, green and non-toxic, safe and environmentally friendly; the coating is cured to forma film in relatively short time at a room temperature;in a performance evaluation test of the inorganic zinc-enriching anticorrosive coating, the coating has no rusting and coating falling phenomena after being observed for 1440 hours, and the result shows that the adhesive force, impact-resisting performance, salt mist resistance and flexible performance of the inorganic zinc-enriching anticorrosive coating are remarkably improved when the high-performance inorganic zinc-enriching long-acting anticorrosive coating and the preparation method thereof are adopted.
Description
technical field [0001] The invention relates to a preparation method of a high-performance inorganic zinc-rich long-acting anti-corrosion coating, which belongs to the field of inorganic zinc powder anti-corrosion coatings. Background technique [0002] Water-based inorganic zinc-rich anti-corrosion coatings are generally based on inorganic silicate (sodium, potassium, lithium) and high-purity inorganic zinc powder as filler to make a two-component water-based inorganic zinc-rich coating. The protective effect of the coating on the base steel is divided into two stages: the first stage is the anodic protection stage, and the zinc powder particles protect the base steel by providing a protective current; the second stage is the barrier protection stage of the coating, which is It is caused by the clogging of the pores in the coating by the corrosion products of zinc powder. Water-based inorganic zinc-rich anti-corrosion coatings have a development history of more than 50 yea...
Claims
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IPC IPC(8): C09D1/04C09D5/10C09D5/18C09D7/12
CPCC09D1/04C09D5/106C09D5/18C09D7/61
Inventor 陈昕雄
Owner QUANZHOU NAISI MATERIAL TECH