CN105039891A - Bacterial-corrosion-resisting ship side plate iron-based high-chrome ceramic composite coating and preparing method thereof - Google Patents
Bacterial-corrosion-resisting ship side plate iron-based high-chrome ceramic composite coating and preparing method thereof Download PDFInfo
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Abstract
A bacterial-corrosion-resisting ship side plate iron-based high-chrome ceramic composite coating comprises, by weight, 1.6-1.8 parts of graphite powder, 25-27 parts of chromium powder, 4.3-4.6 parts of nickel powder, 4.1-4.4 parts of silica powder, 0.3-0.4 part of boron powder, 40-42 parts of iron powder, 10-12 parts of TiAl powder, 20-21 parts of B4C powder, 2-3 parts of multiwalled carbon nanotube, 3-4 parts of ferrovanadium and 1-1.2 parts of nano-silver. According to the metallurgy coating, an iron-based high-chrome material is adopted, and the superior sea water corrosion resistance performance is achieved. By means of TiAl and B4C, a ceramic phase and a metal phase are closely combined through alloying treatment, and the combining performance with the iron-based material, the sea water corrosion resistance, the impact resistance and the abrasion resistance are improved. Through the multi-walled carbon nanotube, the ferrovanadium and the nano-silver, the hardness of the coating is obviously improved, the abrasion amount is obviously reduced, the anti-bacterium performance is good, and bacterial corrosion is reduced.
Description
Technical field
The present invention relates to metallurgical coatings art, particularly relate to a kind of strake of resistance to bacterial corrosion iron-based height chromium ceramic composite coating and preparation method thereof.
Background technology
The approach solving material seawater corrosion resistance has multiple, and top coat protection is a kind of conventional method.In this field, except widely used organic coating, thermospray aluminium zinc layer is also conventional marine steel structure long-effective corrosion etching method.But thermospray needs strict surface pretreatment, in the marine atmosphere of humidity, construction is subject to a definite limitation.The impact wear resistance of organic coating and thermospray aluminium zinc preservative coat is very poor in addition.
Plasma beam surface metallurgical technology take plasma arc as thermal source, adopt synchronous powder feeding system mode, at material surface cladding one deck alloy layers such as iron and steel, having composition variable range greatly, does not need strict pre-treatment, coating dense uniform imporosity, with matrix be the advantages such as metallurgical binding.Plasma beam surface metallurgical coating is successfully applied to high abrasion and shock-resistant occasion in a large number, is the wide metallic surface high impact-resistant anti-wear protection new technology of a kind of development prospect." Corrosion Resistance in Seawater of Fe-Based High Chromium Coating Produced by DC-Plasma Jet Surface Metallurgy " one literary composition uses the element such as iron, chromium to carry out the spraying of plasma beam surface metallurgical technology, the coating obtained has good erosion resistance, compactness, but or existence is easily peeled off, erosion resistance is lasting not, wear no resistance, shock-resistance is bad, the shortcomings such as anti-bacterial and anti-fouling difference, need to improve.
" TiAl-B
4c composite seawater corrosion resistance Journal of Sex Research " the TiAl/B4C matrix material of 10wt% ~ 40wt%TiAl content prepared by hot pressed sintering of a literary composition carries out the full leaching experiment of 60 days in natural sea-water, carry out observation by SEM to the erosion profile of sample to characterize, XRD analysis phase structure is inferred corrosion process, and combined with electrochemical testing impedance carries out the analysis of concrete quantification to the power of sample corrosion resistance.Conclusion shows, TiAl/B
4c has good Seawater durability, and quality is light, and wear resistance is good, good in oxidation resistance, has the characteristic of metal and ceramic phase combination, and the metallurgical coating this material being used for strake will produce wholesome effect to the performance of coating.
Summary of the invention
The object of the present invention is to provide a kind of strake of resistance to bacterial corrosion iron-based height chromium ceramic composite coating and preparation method thereof, this coating hardness significantly improves, and abrasion loss obviously reduces, and anti-microbial property is good, decreases bacterial corrosion.
Technical scheme of the present invention is as follows:
A kind of strake of resistance to bacterial corrosion iron-based height chromium ceramic composite coating, is characterized in that being made up of the raw material of following weight part: Graphite Powder 99 1.6-1.8, chromium powder 25-27, nickel powder 4.3-4.6, silica flour 4.1-4.4, boron powder 0.3-0.4, iron powder 40-42, TiAl powder 10-12, B
4c powder 20-21, multi-walled carbon nano-tubes 2-3, vanadium iron 3-4, nanometer silver 1-1.2.
The described strake of resistance to bacterial corrosion iron-based height chromium ceramic composite coating, is characterized in that:
(1) by TiAl powder and B
4c powder carries out ball milling mixing, and send into vacuum oven, at 1580-1630 DEG C, corresponding pressure is under 14MPa-17MPa condition, and insulation 30-60min, takes out, water-cooled, broken, then carries out ball milling, is less than 130 μm, obtains powder to particle diameter;
(2) by multi-walled carbon nano-tubes, nanometer silver mixing, stir, then mix with the powder that other remaining components, (1) step obtain, carrying out being milled to particle diameter is 60-180 μm, obtains iron-based pottery mixed powder;
(3) cast iron surface is removed oxide on surface, spray on graphitic cast iron matrix with plasma surface metallurgical machine by iron-based pottery mixed powder, coat-thickness is 3-5mm, to obtain final product.
Beneficial effect of the present invention
The metallurgical coating of the present invention employs iron-based high-chromium material, has excellent sea water corrosion resistant; By using TiAl, B
4c, by Alloying Treatment, makes ceramic phase and metallographic phase combine closely, improves and the associativity of iron, resistance to corrosion seawater, shock-resistance and wear resistance; By using multi-walled carbon nano-tubes, vanadium iron, nanometer silver, coating hardness significantly improves, and abrasion loss obviously reduces, and anti-microbial property is good, decreases bacterial corrosion.
Embodiment
A kind of strake of resistance to bacterial corrosion iron-based height chromium ceramic composite coating, is made up of the raw material of following weight part (kilogram): Graphite Powder 99 1.7, chromium powder 26, nickel powder 4.5, silica flour 4.3, boron powder 0.3, iron powder 41, TiAl powder 11, B
4c powder 20, multi-walled carbon nano-tubes 2.5, vanadium iron 3.5, nanometer silver 1.1.
The described strake of resistance to bacterial corrosion iron-based height chromium ceramic composite coating, is characterized in that:
(1) by TiAl powder and B
4c powder carries out ball milling mixing, and send into vacuum oven, at 1630 DEG C, corresponding pressure is under 17MPa condition, and insulation 40min, takes out, water-cooled, broken, then carries out ball milling, is less than 130 μm, obtains powder to particle diameter;
(2) by multi-walled carbon nano-tubes, nanometer silver mixing, stir, then mix with the powder that other remaining components, (1) step obtain, carrying out being milled to particle diameter is 60-180 μm, obtains iron-based pottery mixed powder;
(3) cast iron surface is removed oxide on surface, spray on graphitic cast iron matrix with plasma surface metallurgical machine by iron-based pottery mixed powder, coat-thickness is 4mm, to obtain final product.
Experimental data:
This embodiment coatingsurface is smooth, and metallurgy layer interior tissue is even, fine and closely woven, and without macrocrack and oxide inclusions, pore is less, and in artificial seawater, immersion completes after 160 hours and is not corroded.
Examine coating in oxidation by experiment respectively, chlorination, hot corrosion resistance in vulcanized gas under 450 DEG C of high temperature, simultaneously by graphitic cast iron matrix and control sample of the present invention, coat-thickness is 4mm, test is carried out in air resistance furnace, sample utilized electronic-weighing every 10 hours, except oxidation corrosion test, after other two kinds of corrosion tests all need to spray corrosion reagent, together put back in stove with the sample of oxidation corrosion and heat and weigh, test in next week is carried out again after record weighing data, 20 cycles are carried out in test altogether, wherein, chlorination test adopts 5%NaCl aqueous solution spray, sulfuration test employing mol ratio is the Na2S2O7+K2S2O7 saturated aqueous solution coating of 7:3, test proves, corrosion fatigue life of the present invention is 6 times of common grey iron marine side plate.
Claims (2)
1. the strake of a resistance to bacterial corrosion iron-based height chromium ceramic composite coating, is characterized in that being made up of the raw material of following weight part: Graphite Powder 99 1.6-1.8, chromium powder 25-27, nickel powder 4.3-4.6, silica flour 4.1-4.4, boron powder 0.3-0.4, iron powder 40-42, TiAl powder 10-12, B
4c powder 20-21, multi-walled carbon nano-tubes 2-3, vanadium iron 3-4, nanometer silver 1-1.2.
2. the strake of resistance to bacterial corrosion iron-based height chromium ceramic composite coating according to claim 1, is characterized in that:
(1) by TiAl powder and B
4c powder carries out ball milling mixing, and send into vacuum oven, at 1580-1630 DEG C, corresponding pressure is under 14MPa-17MPa condition, and insulation 30-60min, takes out, water-cooled, broken, then carries out ball milling, is less than 130 μm, obtains powder to particle diameter;
(2) by multi-walled carbon nano-tubes, nanometer silver mixing, stir, then mix with the powder that other remaining components, (1) step obtain, carrying out being milled to particle diameter is 60-180 μm, obtains iron-based pottery mixed powder;
(3) cast iron surface is removed oxide on surface, spray on graphitic cast iron matrix with plasma surface metallurgical machine by iron-based pottery mixed powder, coat-thickness is 3-5mm, to obtain final product.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112342487A (en) * | 2020-10-15 | 2021-02-09 | 西安特种设备检验检测院 | Microbial corrosion resistant treatment method for pipeline steel surface |
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Application publication date: 20151111 |