1. A corrosion-resistant scale-proof, heat-resistant and oxidation-resistant electric heating tube is characterized in that: the protective layer that plates including stainless steel main part and stainless steel main part surface, its raw materials of protective layer include according to the weight: 10-20 parts of epoxy resin, 1-3 parts of pretreating agent, 10-20 parts of nano titanium powder, 60-80 parts of organic solvent, 10-30 parts of organic silicon heat-resistant resin and 15-25 parts of phosphite antioxidant.

2. A corrosion-resistant, scale-resistant, heat-resistant and oxidation-resistant electric heating tube according to claim 1, characterized in that: the protective layer comprises the following raw materials in parts by weight: 10 parts of epoxy resin, 1 part of pretreating agent, 10 parts of nano titanium powder, 60 parts of organic solvent, 10 parts of organic silicon heat-resistant resin and 15 parts of phosphite antioxidant.

3. A corrosion-resistant, scale-resistant, heat-resistant and oxidation-resistant electric heating tube according to claim 1, characterized in that: the protective layer comprises the following raw materials in parts by weight: 15 parts of epoxy resin, 2 parts of pretreating agent, 15 parts of nano titanium powder, 70 parts of organic solvent, 20 parts of organic silicon heat-resistant resin and 20 parts of phosphite antioxidant.

4. A corrosion-resistant, scale-resistant, heat-resistant and oxidation-resistant electric heating tube according to claim 1, characterized in that: the protective layer comprises the following raw materials in parts by weight: 20 parts of epoxy resin, 3 parts of pretreating agent, 20 parts of nano titanium powder, 80 parts of organic solvent, 30 parts of organic silicon heat-resistant resin and 25 parts of phosphite antioxidant.

5. A corrosion-resistant, scale-resistant, heat-resistant and oxidation-resistant electric heating tube according to claim 1, characterized in that: the pretreating agent is a mixture and is prepared by mixing one or more of surfactants OP-10, Tween 80 and Tween 60, one of furfural resin and amino resin, and diisobutyl phthalate in equal mass ratio.

6. A corrosion-resistant, scale-resistant, heat-resistant and oxidation-resistant electric heating tube according to claim 1, characterized in that: the organic solvent is one or a mixture of two of toluene, xylene, n-butanol, n-octanol and ethyl acetate.

7. A processing method of an anti-corrosion anti-scale, heat-resistant and anti-oxidation electric heating pipe is characterized in that: the method specifically comprises the following steps:

s1, electric heating pipe pretreatment: the outer surface of a stainless steel main body which is made of a stainless steel material and is bent and molded is polished, acetone and alcohol are used for cleaning for 30min and then drying is carried out, the cleaned stainless steel main body is placed in vacuum equipment, protective gas is firstly introduced for ventilation cleaning, then argon ion glow sputtering is carried out on an electric heating tube body for 10min, and dirt and an oxide layer on the outer surface are removed;

s2, corrosion and scale prevention liquid: mixing nano titanium powder and a pretreating agent, putting the mixture into a planetary ball mill to pretreat the nano titanium powder to obtain titanium powder slurry, coating a layer of organic functional groups on the surface of the treated nano titanium powder, dissolving epoxy resin in an organic solvent to obtain an epoxy resin solution, and mixing the titanium powder slurry and the epoxy resin solution to obtain an anti-corrosion and anti-scaling solution;

s3, heat-resistant antioxidant liquid: dissolving organic silicon heat-resistant resin and phosphite antioxidant in an organic solvent, stirring for 10-20min at the rotating speed of 250-350r/min by a stirring device, and repeatedly stirring for three times, wherein the time interval between two adjacent times of stirring is 5min, so as to obtain heat-resistant antioxidant liquid;

s4, plating a protective layer: the high-voltage electron gun vaporizes the anti-corrosion anti-scaling liquid and the heat-resistant anti-oxidation liquid, the vaporized anti-corrosion anti-scaling liquid and the vaporized heat-resistant anti-oxidation liquid are uniformly distributed on the outer surface of the stainless steel main body, and the electric heating tube product with the anti-corrosion anti-scaling and heat-resistant anti-oxidation protective layer is obtained after the outer surface of the stainless steel main body is coated with a film for 40 min.

8. The method for manufacturing an electric heating tube with corrosion resistance, scale prevention, heat resistance and oxidation resistance as claimed in claim 7, wherein: the protective gas in the S1 is any one of argon or helium, and the purity is more than 99.995%.

Background

The electric heating pipe is often used in production or life, but the problems of pitting corrosion, corrosion cracking and the like often occur in the electric heating pipe made of stainless steel and the like in equipment due to various conditions of salt mist, seawater, acid, alkali and the like in the application environment. Even the most common domestic water boiling equipment has the problems that the corrosion failure of the electric heating pipe is aggravated due to the reasons of inconsistent water quality, over-hard water quality, over-high chloride content and the like of an end user.

The corrosion-resistant, scale-resistant, heat-resistant and oxidation-resistant electric heating pipe and the processing method thereof are provided for solving the problems that the corrosion-resistant, scale-resistant and oxidation-resistant performances of the existing electric heating pipe are to be improved, the service life of the electric heating pipe is greatly influenced, and a protective layer is partially arranged on the outer surface of the electric heating pipe, but the service life of the protective layer is short.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a corrosion-resistant, scale-resistant, heat-resistant and oxidation-resistant electric heating tube and a processing method thereof, and solves the problems that the corrosion-resistant, scale-resistant and oxidation-resistant performances of the conventional electric heating tube need to be improved, and the service time is short when a protective layer is arranged on the outer surface of the electric heating tube.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a corrosion-resistant, scale-resistant, heat-resistant and oxidation-resistant electric heating tube comprises a stainless steel main body and a protective layer plated on the outer surface of the stainless steel main body, wherein the protective layer comprises the following raw materials in parts by weight: 10-20 parts of epoxy resin, 1-3 parts of pretreating agent, 10-20 parts of nano titanium powder, 60-80 parts of organic solvent, 10-30 parts of organic silicon heat-resistant resin and 15-25 parts of phosphite antioxidant.

Preferably, the protective layer comprises the following raw materials in parts by weight: 10 parts of epoxy resin, 1 part of pretreating agent, 10 parts of nano titanium powder, 60 parts of organic solvent, 10 parts of organic silicon heat-resistant resin and 15 parts of phosphite antioxidant.

Preferably, the protective layer comprises the following raw materials in parts by weight: 15 parts of epoxy resin, 2 parts of pretreating agent, 15 parts of nano titanium powder, 70 parts of organic solvent, 20 parts of organic silicon heat-resistant resin and 20 parts of phosphite antioxidant.

Preferably, the protective layer comprises the following raw materials in parts by weight: 20 parts of epoxy resin, 3 parts of pretreating agent, 20 parts of nano titanium powder, 80 parts of organic solvent, 30 parts of organic silicon heat-resistant resin and 25 parts of phosphite antioxidant.

Preferably, the pretreating agent is a mixture prepared by mixing one or more of surfactants OP-10, Tween 80 and Tween 60, one of furfural resin and amino resin, and diisobutyl phthalate in equal mass ratio.

Preferably, the organic solvent is one or a mixture of two of toluene, xylene, n-butanol, n-octanol and ethyl acetate.

The invention also discloses a processing method of the corrosion-resistant, scale-resistant, heat-resistant and oxidation-resistant electric heating tube, which specifically comprises the following steps:

s1, electric heating pipe pretreatment: the outer surface of a stainless steel main body which is made of a stainless steel material and is bent and molded is polished, acetone and alcohol are used for cleaning for 30min and then drying is carried out, the cleaned stainless steel main body is placed in vacuum equipment, protective gas is firstly introduced for ventilation cleaning, then argon ion glow sputtering is carried out on an electric heating tube body for 10min, and dirt and an oxide layer on the outer surface are removed;

s2, corrosion and scale prevention liquid: mixing nano titanium powder and a pretreating agent, putting the mixture into a planetary ball mill to pretreat the nano titanium powder to obtain titanium powder slurry, coating a layer of organic functional groups on the surface of the treated nano titanium powder, dissolving epoxy resin in an organic solvent to obtain an epoxy resin solution, and mixing the titanium powder slurry and the epoxy resin solution to obtain an anti-corrosion and anti-scaling solution;

s3, heat-resistant antioxidant liquid: dissolving organic silicon heat-resistant resin and phosphite antioxidant in an organic solvent, stirring for 10-20min at the rotating speed of 250-350r/min by a stirring device, and repeatedly stirring for three times, wherein the time interval between two adjacent times of stirring is 5min, so as to obtain heat-resistant antioxidant liquid;

s4, plating a protective layer: the high-voltage electron gun vaporizes the anti-corrosion anti-scaling liquid and the heat-resistant anti-oxidation liquid, the vaporized anti-corrosion anti-scaling liquid and the vaporized heat-resistant anti-oxidation liquid are uniformly distributed on the outer surface of the stainless steel main body, and the electric heating tube product with the anti-corrosion anti-scaling and heat-resistant anti-oxidation protective layer is obtained after the outer surface of the stainless steel main body is coated with a film for 40 min.

Preferably, the protective gas in S1 is any one of argon or helium, and the purity is greater than 99.995%.

(III) advantageous effects

The invention provides a corrosion-resistant, scale-resistant, heat-resistant and oxidation-resistant electric heating tube and a processing method thereof. Compared with the prior art, the method has the following beneficial effects: the corrosion-resistant, scale-resistant, heat-resistant and oxidation-resistant electric heating tube and the processing method thereof are characterized in that a protective layer is plated on the outer surface of a stainless steel main body and the outer surface of the stainless steel main body, and the protective layer comprises the following raw materials in parts by weight: 10-20 parts of epoxy resin, 1-3 parts of pretreating agent, 10-20 parts of nano titanium powder, 60-80 parts of organic solvent, 10-30 parts of organic silicon heat-resistant resin and 15-25 parts of phosphite antioxidant, wherein a multi-layer protective barrier can be formed by utilizing the strong bonding force of the epoxy resin and the nano titanium powder, so that the penetration of corrosive media can be effectively blocked, meanwhile, a passivation layer can also be formed by the excellent passivation effect of the nano titanium powder, the corrosion can be further inhibited, and the heat resistance and the oxidation resistance of the electric heating tube can be effectively improved by matching the organic silicon heat-resistant resin and the phosphite antioxidant.

Drawings

FIG. 1 is a process flow diagram of the corrosion-resistant, scale-resistant, heat-resistant and oxidation-resistant electric heating tube of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, an embodiment of the present invention provides a technical solution: a corrosion-resistant, scale-resistant, heat-resistant and oxidation-resistant electric heating tube and a processing method thereof specifically comprise the following embodiments:

example 1

Including the protective layer that stainless steel main part and stainless steel main part surface plated, its raw materials of protective layer include according to the weight: 10 parts of epoxy resin, 1 part of pretreating agent, 10 parts of nano titanium powder, 60 parts of organic solvent, 10 parts of organic silicon heat-resistant resin and 15 parts of phosphite antioxidant.

Preferably, the pretreating agent is a mixture prepared by mixing one or more of surfactants OP-10, Tween 80 and Tween 60, one of furfural resin and amino resin, and diisobutyl phthalate in equal mass ratio.

Preferably, the organic solvent is one or a mixture of two of toluene, xylene, n-butanol, n-octanol and ethyl acetate.

The invention also discloses a processing method of the corrosion-resistant, scale-resistant, heat-resistant and oxidation-resistant electric heating tube, which specifically comprises the following steps:

s1, electric heating pipe pretreatment: the outer surface of a stainless steel main body which is made of a stainless steel material and is bent and molded is polished, acetone and alcohol are used for cleaning for 30min and then drying is carried out, the cleaned stainless steel main body is placed in vacuum equipment, protective gas is firstly introduced for ventilation cleaning, then argon ion glow sputtering is carried out on an electric heating tube body for 10min, and dirt and an oxide layer on the outer surface are removed;

s2, corrosion and scale prevention liquid: mixing nano titanium powder and a pretreating agent, putting the mixture into a planetary ball mill to pretreat the nano titanium powder to obtain titanium powder slurry, coating a layer of organic functional groups on the surface of the treated nano titanium powder, dissolving epoxy resin in an organic solvent to obtain an epoxy resin solution, and mixing the titanium powder slurry and the epoxy resin solution to obtain an anti-corrosion and anti-scaling solution;

s3, heat-resistant antioxidant liquid: dissolving organic silicon heat-resistant resin and phosphite ester antioxidant in an organic solvent, stirring for 10min at a rotating speed of 250r/min by a stirring device, repeatedly stirring for three times, and stirring for 5min at an interval of two adjacent times to obtain heat-resistant antioxidant liquid;

s4, plating a protective layer: the high-voltage electron gun vaporizes the anti-corrosion anti-scaling liquid and the heat-resistant anti-oxidation liquid, the vaporized anti-corrosion anti-scaling liquid and the vaporized heat-resistant anti-oxidation liquid are uniformly distributed on the outer surface of the stainless steel main body, and the electric heating tube product with the anti-corrosion anti-scaling and heat-resistant anti-oxidation protective layer is obtained after the outer surface of the stainless steel main body is coated with a film for 40 min.

In the embodiment of the invention, the protective gas in the S1 is any one of argon or helium, and the purity is greater than 99.995%.

Example 2

Including the protective layer that stainless steel main part and stainless steel main part surface plated, its raw materials of protective layer include according to the weight: 15 parts of epoxy resin, 2 parts of pretreating agent, 15 parts of nano titanium powder, 70 parts of organic solvent, 20 parts of organic silicon heat-resistant resin and 20 parts of phosphite antioxidant.

Preferably, the pretreating agent is a mixture prepared by mixing one or more of surfactants OP-10, Tween 80 and Tween 60, one of furfural resin and amino resin, and diisobutyl phthalate in equal mass ratio.

Preferably, the organic solvent is one or a mixture of two of toluene, xylene, n-butanol, n-octanol and ethyl acetate.

The invention also discloses a processing method of the corrosion-resistant, scale-resistant, heat-resistant and oxidation-resistant electric heating tube, which specifically comprises the following steps:

s1, electric heating pipe pretreatment: the outer surface of a stainless steel main body which is made of a stainless steel material and is bent and molded is polished, acetone and alcohol are used for cleaning for 30min and then drying is carried out, the cleaned stainless steel main body is placed in vacuum equipment, protective gas is firstly introduced for ventilation cleaning, then argon ion glow sputtering is carried out on an electric heating tube body for 10min, and dirt and an oxide layer on the outer surface are removed;

s2, corrosion and scale prevention liquid: mixing nano titanium powder and a pretreating agent, putting the mixture into a planetary ball mill to pretreat the nano titanium powder to obtain titanium powder slurry, coating a layer of organic functional groups on the surface of the treated nano titanium powder, dissolving epoxy resin in an organic solvent to obtain an epoxy resin solution, and mixing the titanium powder slurry and the epoxy resin solution to obtain an anti-corrosion and anti-scaling solution;

s3, heat-resistant antioxidant liquid: dissolving organic silicon heat-resistant resin and phosphite ester antioxidant in an organic solvent, stirring for 15min at the rotating speed of 300r/min by a stirring device, repeatedly stirring for three times, and stirring for 5min at the interval of two adjacent times to obtain heat-resistant antioxidant liquid;

s4, plating a protective layer: the high-voltage electron gun vaporizes the anti-corrosion anti-scaling liquid and the heat-resistant anti-oxidation liquid, the vaporized anti-corrosion anti-scaling liquid and the vaporized heat-resistant anti-oxidation liquid are uniformly distributed on the outer surface of the stainless steel main body, and the electric heating tube product with the anti-corrosion anti-scaling and heat-resistant anti-oxidation protective layer is obtained after the outer surface of the stainless steel main body is coated with a film for 40 min.

In the embodiment of the invention, the protective gas in S1 is any one of argon or helium, and the purity is more than 99.995 percent

Example 3

Including the protective layer that stainless steel main part and stainless steel main part surface plated, its raw materials of protective layer include according to the weight: 20 parts of epoxy resin, 3 parts of pretreating agent, 20 parts of nano titanium powder, 80 parts of organic solvent, 30 parts of organic silicon heat-resistant resin and 25 parts of phosphite antioxidant.

Preferably, the pretreating agent is a mixture prepared by mixing one or more of surfactants OP-10, Tween 80 and Tween 60, one of furfural resin and amino resin, and diisobutyl phthalate in equal mass ratio.

Preferably, the organic solvent is one or a mixture of two of toluene, xylene, n-butanol, n-octanol and ethyl acetate.

The invention also discloses a processing method of the corrosion-resistant, scale-resistant, heat-resistant and oxidation-resistant electric heating tube, which specifically comprises the following steps:

s1, electric heating pipe pretreatment: the outer surface of a stainless steel main body which is made of a stainless steel material and is bent and molded is polished, acetone and alcohol are used for cleaning for 30min and then drying is carried out, the cleaned stainless steel main body is placed in vacuum equipment, protective gas is firstly introduced for ventilation cleaning, then argon ion glow sputtering is carried out on an electric heating tube body for 10min, and dirt and an oxide layer on the outer surface are removed;

s2, corrosion and scale prevention liquid: mixing nano titanium powder and a pretreating agent, putting the mixture into a planetary ball mill to pretreat the nano titanium powder to obtain titanium powder slurry, coating a layer of organic functional groups on the surface of the treated nano titanium powder, dissolving epoxy resin in an organic solvent to obtain an epoxy resin solution, and mixing the titanium powder slurry and the epoxy resin solution to obtain an anti-corrosion and anti-scaling solution;

s3, heat-resistant antioxidant liquid: dissolving organic silicon heat-resistant resin and phosphite ester antioxidant in an organic solvent, stirring for 20min at the rotating speed of 350r/min by a stirring device, repeatedly stirring for three times, and stirring for 5min at the interval of two adjacent times to obtain heat-resistant antioxidant liquid;

s4, plating a protective layer: the high-voltage electron gun vaporizes the anti-corrosion anti-scaling liquid and the heat-resistant anti-oxidation liquid, the vaporized anti-corrosion anti-scaling liquid and the vaporized heat-resistant anti-oxidation liquid are uniformly distributed on the outer surface of the stainless steel main body, and the electric heating tube product with the anti-corrosion anti-scaling and heat-resistant anti-oxidation protective layer is obtained after the outer surface of the stainless steel main body is coated with a film for 40 min.

In the embodiment of the invention, the protective gas in the S1 is any one of argon or helium, and the purity is greater than 99.995%.

To sum up, utilize epoxy and nanometer titanium powder cohesion strong, can form the protection barrier of multilayer, block the infiltration of corrosive medium effectively, the excellent passivation of nanometer titanium powder simultaneously also can form the passivation layer, further inhibits the emergence of corruption, cooperates organic silicon heat-resistant resin and phosphite antioxidant, the effectual heat-resisting anti-oxidant that has promoted electric heating pipe.

And those not described in detail in this specification are well within the skill of those in the art.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.