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A high toughness enamel coating resistant to high temperature hot water corrosion

A high-toughness, high-temperature-resistant technology, applied in the field of enamel coating, can solve problems affecting the service life of the enamel liner, cracks on the enamel body, and poor toughness of the enamel layer, so as to overcome porcelain cracks, high service temperature, and improve toughness Effect

Active Publication Date: 2017-03-08
JIANGYIN SILICON GENERAL ENAMEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] On the other hand, when in use, the enamel liner also needs to withstand sudden changes in the pressure of cold and hot water in and out of the water pipes and the sudden change in temperature difference in an instant, which can easily induce cracks in the enamel layer and even cause damage to the enamel layer. Damage is especially easy to occur at the overlapping weld between the inner tank head and the barrel body, such as figure 1 , figure 2 shown
In addition, due to the poor toughness of the enamel layer during transportation, the existing enamel liner is also very prone to collision and cracking, which affects the service life of the enamel liner

Method used

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  • A high toughness enamel coating resistant to high temperature hot water corrosion
  • A high toughness enamel coating resistant to high temperature hot water corrosion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A high-toughness enamel coating resistant to high-temperature hot water corrosion includes: a porcelain layer base material and abrasives,

[0037] The mass ratio of the porcelain base material is as follows:

[0038] SiO 2 50

[0039] al 2 o 3 1.0

[0040] ZrO 2 5

[0041] TiO 2 2

[0042] B 2 o 3 10

[0043] Li 2 O 3

[0044] Na 2 O 15

[0045] CaF 2 2

[0046] Na 2 SiF 6 2

[0047] CoO 1.5

[0048] NiO 0.3

[0049] MnO 0.3;

[0050] The mass portion proportioning of described ground addition thing is as follows:

[0051] Glaze (cullet) 100

[0052] Quartz sand 25

[0053] Zirconia fiber 5

[0054] Y 2 o 3 0.3

[0055] Magnesium carbonate 0.5

[0056] Borax pentahydrate 0.4

[0057] Sodium aluminate 0.5

[0058] Sodium nitrite 0.2.

[0059] The enamel coating and metal liner of the above ratio are used to fire the enamel liner for water heaters. The firing temperature is 860°C. After the 180° bending test, the porcelain will no...

Embodiment 2

[0061] A high-toughness enamel coating resistant to high-temperature hot water corrosion includes: a porcelain layer base material and abrasives,

[0062] The mass ratio of the porcelain base material is as follows:

[0063] SiO 2 52

[0064] ZrO 2 8

[0065] TiO 2 5

[0066] B2 o 3 12

[0067] Li 2 O 2

[0068] Na 2 O 14

[0069] CaF 2 2

[0070] Na 2 SiF 6 3

[0071] CoO 1

[0072] NiO 0.2

[0073] MnO 0.4;

[0074] The mass portion proportioning of described ground addition thing is as follows:

[0075] Glaze 100

[0076] Quartz sand 18

[0077] Zirconia fiber 10

[0078] Y 2 o 3 0.5

[0079] Magnesium carbonate 0.8

[0080] Borax pentahydrate 0.3

[0081] Sodium aluminate 0.5

[0082] Sodium nitrite 0.4.

[0083] The enamel coating and metal liner of the above ratio are used to fire the enamel liner for water heaters. The firing temperature is 860°C. After the 180° bending test, the porcelain will not fall off and has high toughness. Af...

Embodiment 3

[0085] A high-toughness enamel coating resistant to high-temperature hot water corrosion includes: a porcelain layer base material and abrasives,

[0086] The mass ratio of the porcelain base material is as follows:

[0087] SiO 2 50

[0088] Al 2 o 3 0.8

[0089] ZrO 2 3

[0090] TiO 2 4

[0091] B 2 o 3 10

[0092] Li 2 O 3

[0093] Na 2 O 16

[0094] CaF 2 4

[0095] Na 2 SiF 6 1

[0096] CoO 1.5

[0097] NiO 0.4

[0098] MnO 0.5;

[0099] The mass portion proportioning of described ground addition thing is as follows:

[0100] Glaze 100

[0101] Quartz sand 20

[0102] Zirconia fiber 8

[0103] Y 2 o 3 0.3

[0104] Magnesium Carbonate 1

[0105] Borax pentahydrate 0.5

[0106] Sodium aluminate 0.3

[0107] Sodium nitrite 0.4.

[0108] The enamel coating and metal liner of the above ratio are used to fire the enamel liner for water heaters. The firing temperature is 860°C. After the 180° bending test, the porcelain will not fall off ...

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Abstract

The invention relates to a high-temperature-hot-water-resistance high-toughness enamel coating which comprises an enamel coating base material and a grinding additive. The enamel coating base material is composed of the following components in parts by mass: 50-52 parts of SiO2, 0-1.0 part of Al2O3, 3-8 parts of ZrO2, 2-5 parts of TiO2, 10-12 parts of B2O3, 2-3 parts of Li2O, 14-16 parts of Na2O, 2-4 parts of CaF2, 1-3 parts of Na2SiF6, 1-1.5 parts of CoO, 0.2-0.4 part of NiO and 0.3-0.5 part of MnO. The grinding additive is composed the following components in parts by mass: 100 parts of glaze, 15-25 parts of quartz sand, 5-10 parts of zirconium oxide fiber, 0.5-1 part of magnesium carbonate, 0.3-0.5 part of sodium borate pentahydrate, 0.3-0.5 part of sodium aluminate and 0.2-0.4 part of sodium nitrate. The ZrO2 fiber is added into the grinding additive to obviously enhance the toughness of the enamel coating, improve the high-temperature hot water resistance of the enamel coating, enhance the thermal shock resistance and hydraulic pressure sudden change resistance of the enamel liner and overcome the defect of enamel cracking due to collisions.

Description

technical field [0001] The invention relates to an enamel coating for a water heater inner tank, in particular to an enamel coating resistant to high temperature hot water corrosion and having relatively high toughness. Background technique [0002] The enamel water heater liner originated in the United States. The enamel liner is a liner with enamel coating sintered on the inner surface. The enamel liner can be used as an enamel water tank after foaming. It can be applied to solar water heaters, air energy water heaters and electric water heaters. . The enamel inner tank is replacing other inner tanks and becoming the main force of the water heater inner tank because of its superior performance in anti-corrosion, pressure-bearing durability, anti-absorption, and clean water. Years of research and practice have shown that in addition to acids and alkalis that can corrode the enamel surface, water also corrodes the enamel surface, and it increases with the increase of water ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C8/14
Inventor 余献忠
Owner JIANGYIN SILICON GENERAL ENAMEL
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