Heater and preparation method thereof
A heating utensil and heating technology, which is applied to special materials for cooking utensils, metal material coating process, fusion spraying, etc. Poor and other problems, to achieve good hydrophobicity and non-stickiness, improve bonding strength, good hydrophobicity
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[0050] The preparation method of the heating appliance of the present invention comprises the following steps:
[0051] (1) forming an aluminum oxide layer 2 on the inner surface of the substrate 1 by thermal spraying;
[0052] (2) Optionally, a black ceramic layer 3 is formed on the upper surface of the aluminum oxide layer 2;
[0053] (3) A PFA-black ceramic hybrid coating is formed on the upper surface of the alumina layer 2 or the black ceramic layer 3 .
[0054] In step (1), the aluminum oxide layer 2 can be formed by a conventional thermal spraying method in the art.
[0055] In the method for preparing the heating appliance of the present invention, the step (2) of forming the black ceramic layer 3 is an optional operation, that is, the black ceramic layer 3 may or may not be formed. Preferably, step (2) needs to be implemented to further improve the stain resistance of the non-stick coating and the bonding strength with the substrate.
[0056] In the present inventi...
Embodiment 1
[0076] (1) Pretreat the base of the aluminum pan, wherein the pretreatment methods include: a) degreasing at 55°C for 8 minutes; b) cleaning with deionized water; c) drying at 100°C for 5 minutes; d) using 60°C -80-mesh brown steel grit, sandblasting the surface of the aluminum pot substrate under the pressure of 0.6MPa jet airflow to make the surface roughness Ra 3μm, and then blow off the remaining powder particles on the surface of the pot body substrate with the airflow; e) Wash with 40% by weight of NaOH solution at 80°C for 1 minute; f) neutralize with 20% by weight of nitric acid solution for 3 minutes; g) wash with deionized water, then dry at 300°C for 12 minutes;
[0077] (2) Preheating the substrate surface obtained in step (1) to 120°C;
[0078] (3) Al2 o 3 The powder is subjected to plasma spraying treatment to form an alumina layer (60 μm in thickness and 4 μm in roughness) on the surface of the substrate, wherein the conditions of plasma spraying treatment incl...
Embodiment 2
[0082] (1) Pretreat the base of the stainless steel pot, wherein the pretreatment methods include: a) degreasing at 55°C for 8 minutes; b) cleaning with deionized water; c) drying at 100°C for 5 minutes; d) using 60°C -80 mesh brown steel sand, under the air jet pressure of 0.8MPa, the surface of the stainless steel pot substrate is sandblasted to make the surface roughness Ra 3 μm, and then the powder particles remaining on the surface of the pot body substrate are blown clean by air flow; e) Wash with 40% by weight of NaOH solution at 80°C for 1 minute; f) neutralize with 20% by weight of nitric acid solution for 3 minutes; g) wash with deionized water, then dry at 375°C for 11 minutes;
[0083] (2) Preheating the substrate surface obtained in step (1) to 100°C;
[0084] (3) Al 2 o 3 The powder is subjected to plasma spraying treatment to form an aluminum oxide layer (thickness 40 μm, roughness 3 μm) on the surface of the substrate, wherein the conditions of plasma sprayin...
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