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Aluminum liquid corrosion-resistant glass ceramic and preparation method thereof

A glass-ceramic and aluminum-resistant technology, which is used in the field of aluminum liquid corrosion resistance of metal substrates, can solve the problems of difficult ceramic coating bonding, etc., to improve adhesion, prevent thermal oxidation and aluminum liquid corrosion, and improve flow performance. Effect

Active Publication Date: 2016-12-14
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sintering of ceramic coatings needs to be carried out at a relatively high temperature (usually above 800 ° C), and substrates such as carbon steel and low-alloy steel have been severely oxidized in this temperature range, forming a brittle oxide layer, which is difficult to sinter with ceramic coatings. effective combination of layers

Method used

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  • Aluminum liquid corrosion-resistant glass ceramic and preparation method thereof
  • Aluminum liquid corrosion-resistant glass ceramic and preparation method thereof
  • Aluminum liquid corrosion-resistant glass ceramic and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A method for preparing glass ceramics resistant to corrosion by molten aluminum, comprising the following steps:

[0032] 1) According to the ratio of each component in Table 1, weigh the analytically pure raw material (Al 2 o 3 , B 2 o 3 , SiO 2 、K 2 O, Na 2 O. Co 2 o 3 and MnO 2 ), mixed evenly with a planetary ball mill for 24 hours;

[0033] 2) After crushing and drying the material after ball milling in step (1), pour it into a platinum crucible;

[0034] 3) Place the platinum crucible in a box-type resistance furnace, heat it at 3°C / min to 1100°C in an air atmosphere, and keep it warm for 1 hour; then, take out the crucible, pour the melt into deionized water to quench, and dry to obtain glass Fragments of the melt; ground and passed through a 100-mesh sieve to obtain glass powder.

[0035] Specific application: mix glass powder with polyvinyl alcohol, fish oil, acetone and toluene (mass percentages are 80%, 2%, 1%, 10%, 7%) to form a slurry, and disperse...

Embodiment 2

[0037] A method for preparing glass ceramics resistant to corrosion by molten aluminum, comprising the following steps:

[0038] 1) According to the ratio of each component in Table 1, weigh the analytically pure raw material (Al 2 o 3 , B 2 o 3 , SiO 2 、K 2 O, Na 2 O. Co 2 o 3 and MnO 2 ), mixed evenly with a planetary ball mill for 24 hours;

[0039] 2) After crushing and drying the material after ball milling in step (1), pour it into a platinum crucible;

[0040] 3) Place the platinum crucible in a box-type resistance furnace, heat it at 3°C / min to 1120°C in an air atmosphere, and keep it warm for 1 hour; then, take out the crucible, pour the melt into deionized water to quench, and dry to obtain glass Fragments of the melt; ground and passed through a 100-mesh sieve to obtain glass powder.

[0041] Specific application: mix glass powder with polyvinyl alcohol, fish oil, acetone and toluene (mass percentages are 80%, 2%, 1%, 10%, 7%) to form a slurry, and disper...

Embodiment 3

[0043] A method for preparing glass ceramics resistant to corrosion by molten aluminum, comprising the following steps:

[0044] 1) According to the ratio of each component in Table 1, weigh the analytically pure raw material (Al 2 o 3 , B 2 o 3 , SiO 2 、K 2 O, Na 2 O. Co 2 o 3 and MnO 2 ), mixed evenly with a planetary ball mill for 24 hours;

[0045] 2) After crushing and drying the material after ball milling in step (1), pour it into a platinum crucible;

[0046] 3) Place the platinum crucible in a box-type resistance furnace, heat it at 3°C / min to 1180°C in an air atmosphere, and keep it warm for 1 hour; then, take out the crucible, pour the melt into deionized water to quench, and dry to obtain glass Fragments of the melt; ground and passed through a 100-mesh sieve to obtain glass powder.

[0047] Specific application: mix glass powder with polyvinyl alcohol, fish oil, acetone and toluene (mass percentages are 80%, 2%, 1%, 10%, 7%) to form a slurry, and disper...

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Abstract

The invention discloses an aluminum liquid corrosion-resistant glass ceramic and a preparation method thereof. The aluminum liquid corrosion-resistant glass ceramic is prepared from, by mass, 5%-15% of Al2O3, 20%-35% of B2O3, 15%-25% of SiO2, 20%-35% of M2O and 10%-20% of RO, and the sum of the mass fractions of the above-mentioned raw materials is 100%, wherein RO is formed by mixing Co2O3 and MnO2 according the mass ratio of 1:1. MnO2 and Co2O3 in glass react with an oxide on the surface of a metal substrate, a compact MnFe2O4 and CoFe2Or spinel layer is generated on an interface, adhesion of the glass ceramic and the metal substrate is significantly improved, the metal substrate can be isolated from air and aluminum liquid, and thermal oxidation and aluminum liquid corrosion of the substrate are effectively prevented; K2O and Na2O in the glass not only can improve the fluidity of the glass ceramic and promote the sintering process, but also can improve thermal shock resistance of a coating.

Description

technical field [0001] The invention belongs to the field of corrosion resistance of molten aluminum for metal substrates, and in particular relates to a liquid-aluminum corrosion-resistant glass-ceramic and a preparation method thereof. Background technique [0002] The output of aluminum and its alloys ranks first among non-ferrous metal materials, and they are widely used in transportation, energy, food, electronics and other fields. However, aluminum liquid is one of the most corrosive metal liquids, and it is easy to cause corrosion of direct contact materials in the production of smelting, forming (casting) and hot-dip aluminum plating, which greatly shortens the service life of these materials. In addition, the dissolution of materials in molten aluminum may contaminate the molten aluminum, degrade the performance of aluminum and its alloy products, and even be scrapped. Improving the corrosion resistance of molten aluminum can effectively solve a series of corrosion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C12/00
CPCC03C12/00
Inventor 张腾杜欣航林芬刘鸿琳林德伟唐电
Owner FUZHOU UNIV