CN110802012A - Preparation method and detection method of metal product - Google Patents

Abstract

The invention relates to a preparation method and a detection method of a metal product, wherein a metal material is subjected to the following procedures according to actual requirements: blanking → forging → assembling, welding → coping → surface cleaning treatment → hot galvanizing → priming, polishing → surface cleaning treatment → electrostatic powder spraying or electrostatic paint spraying → sample piece detection → packaging → finished product, and finally obtaining the required metal product; the material for electrostatic powder spraying or electrostatic paint spraying is composed of 85-92% of powder coating or paint agent coating for universal metal surfaces and 8-15% of functional powder. The detection instruments are Dylos DC1700 air quality monitor produced in America, KEC900+ air quality detector produced in Japan; to observe the average particle number of inhalable substances per cubic foot and the negative oxygen ion number released into the atmosphere by the detection sample in real time. The method not only can enable the metal product to have an antirust function, but also has a micro-electrochemical function, and can remove harmful substances such as PM2.5 and the like in the atmosphere environment by retention, adsorption and degradation.

Description

Preparation method and detection method of metal product

Technical Field

The invention relates to the technical field of manufacturing of metal products, in particular to a preparation method and a detection method of a metal product.

Background

Haze, an extreme variation phenomenon of the atmospheric ecological environment, has become an atmospheric disaster that seriously threatens the human living environment. Once haze comes, a large amount of toxic fine dust particles including sulfur dioxide, nitrogen oxides and inhalable particles (such as PM2.5 and PM 10) are dispersed and floated in the air, so that the horizontal visibility is suddenly reduced, and the rapid deterioration of various traffic, transportation and living environments is directly caused. Particularly serious is that the inhalable particles in the air can penetrate through the protective barriers of the respiratory system of the human body such as nasal cilia and the like, enter the respiratory tract and directly reach the lung, and can induce and aggravate respiratory diseases. In addition, the inhalable particles are used as carriers, and a large amount of carcinogenic substances such as heavy metals and polycyclic aromatic hydrocarbons which are extremely harmful to human bodies are attached to the carriers, so that the poisoning phenomenon of a blood system is caused. According to the analysis of the cause of haze, the large amount of toxic particle groups dispersed and floating in the air are firstly various toxic waste gases discharged from automobile exhaust and fossil fuel combustion and industrial production, and secondly dust generated by construction sites and road traffic and products of biomass combustion, kitchen lampblack and the like, and the active and toxic particle groups are difficult to settle and can float and freely and continuously accumulate in the atmosphere for a long time. The myriad of harsh facts indicate: it is the human beings who directly and indirectly participate in creating such an atmospheric disaster that endangers themselves.

As can be easily imagined, the middle and large cities are serious disaster areas where haze attacks first come. The number of the automobiles in the middle and large cities is large, and the contribution rate to haze formation is relatively high. The staggered and standing high-rise building is not beneficial to the settlement and diffusion of pollutants in the atmosphere, and even after high-altitude haze is dissipated, a considerable amount of atmospheric pollutants are remained and accumulated in the space of urban building groups. Due to the large population density and outdoor population flow, the harm of haze is sharply amplified in large and medium cities, and the disease of large cities becomes worse. Some existing satellite and ground detection data show that PM2.5 in the atmosphere of urban groups of Zhuangjia, Changtriangle, Jingjin Ji and Sichuan basin in China is seriously polluted. The average farming place of PM2.5 in the air of the regions is generally in the range of 60-90 micrograms/cubic meter, and under the condition of severely polluted air, the concentration of PM2.5 in the atmosphere is nearly ten times higher.

At present, except for strictly controlling the emission of automobile exhaust and industrial waste gas from the source, the following main technical means for reducing the haze hazard risk are developed, popularized and applied at home and abroad: three-dimensional greening, high-altitude water spraying and nano-level photocatalytic coating. The adopted three-dimensional greening effect is obvious, but the maintenance workload is large, and the haze prevention effect is easily restricted by seasonal changes; the high-altitude water spraying investment is large at one time, the operation cost is high, the treatment range is limited, and the continuation is difficult; the biggest short plate adopting the nano-scale photocatalytic coating has the advantages of far-off-the-clock efficacy and obvious selectivity on retention, adsorption and degradation of some inhalable substances.

In cities, the application amount of metal products is huge, such as fences in the middle of roads, isolation fences beside green belts, balcony railings on buildings and the like, and how to provide the metal products with the functions of retaining, adsorbing and degrading PM2.5 is a technical problem facing people today.

Disclosure of Invention

The invention aims to provide a preparation method and a detection method of a metal product, the preparation method not only can enable the metal product to have the antirust function of common like products, but also can remove harmful substances such as PM2.5 and the like in the atmosphere environment by the micro electrochemical function of the surface of the metal product, and the surface of the metal product has certain hydrophobicity and has all-weather purification effect; the preparation method has simple process, convenient operation and control and stable quality, and is used for realizing large-scale industrial production; the detection method is very simple and effective, and can accurately make people know whether the metal product obtained by the preparation method has the effect of purifying the environment or not, reduce the resistance of popularization and application of the invention, achieve the purposes of being wide in short time and improving the air environment of people.

The technical scheme of the invention is realized as follows: a preparation method and a detection method of a metal product are characterized in that the preparation method of the metal product comprises the following steps:

according to actual requirements, the metal material is subjected to the following procedures: blanking → forging → assembling, welding → coping → surface cleaning treatment → hot galvanizing → priming, polishing → surface cleaning treatment → electrostatic powder spraying or electrostatic paint spraying → sample piece detection → packaging → finished product, and finally obtaining the required metal product;

in the above process, the surface cleaning treatment is to blow oil-free dry air to the workpiece for 10 seconds;

the material for electrostatic powder spraying or electrostatic paint spraying comprises 85-92% of powder coating or paint agent coating for a universal metal surface and 8-15% of functional powder, wherein the 8-15% of functional powder comprises 4-8% of cyclic silicate mineral, 1-2% of aluminum silicate potassium salt, 1-2% of titanium dioxide, 1% of quartz porphyrite and 1-2% of silicon oxide, and the particle size of each component of the functional powder is 1600 meshes;

adding the 8-15% of the functional powder into 85-92% of powder coating or paint agent coating for the universal metal surface, stirring for 5 minutes, and spraying and coating the workpiece by adopting a continuous electrostatic spraying method;

the technological parameters of the powder continuous electrostatic spraying technology are as follows:

① keeping the electrostatic high voltage in the range of 60-90 kV;

② the electrostatic current is between 10-20 muA;

③ the flow rate and pressure is 0.30-0.55 MPa;

④ the atomization pressure is 0.30-0.45 MPa;

⑤ the fluidization pressure of the powder supply barrel is 0.04-0.10 MPa;

⑥ the distance between the nozzle of the spray gun and the workpiece is 150-300 mm;

⑦ the speed of the conveying chain is 4.5-5.5 m/min;

⑧, the actual temperature of the oven is 180-200 ℃, and the curing time is 20-40 minutes;

the technological parameters of the continuous electrostatic spraying technology adopting the paint are as follows:

① the high voltage of the static generator is kept in the range of 30 KV-80 KV;

② the distance between the nozzle of the spray gun and the workpiece is 150-200 mm;

③ the paint pressure is 0-0.3 MPa;

④ the air pressure is 0.05-0.4 MPa;

⑤ the resistance value of the paint is 15-70M omega;

⑥ leveling time of paint is 5-20 minutes;

⑦, the actual temperature of the oven is 70-90 ℃, and the drying time is 20-60 minutes;

the detection method of the metal product comprises the following steps: the detection instruments are Dylos DC1700 air quality monitor produced in America, KEC900+ air quality detector produced in Japan; during detection, the metal product sample obtained by the preparation method and a Dylos DC1700 air quality monitor are placed in a semi-sealed box with the volume about 0.5m for 20 minutes to observe the average particle number of inhalable substances in each cubic foot size;

and placing the metal product sample obtained by the preparation method and the KEC900+ air quality detector into a semi-sealed box with the volume of about 0.5m for carrying out the heavy planting, and detecting the number of negative oxygen ions released into the atmosphere by the sample in real time.

The invention has the beneficial effects that: (1) the metal product has the antirust function of common like products, and can be used for removing harmful substances such as PM2.5 and the like in the atmospheric environment by the micro electrochemical function of the surface of the metal product, and the surface of the metal product has certain hydrophobicity and all-weather purification effect; the preparation method has the advantages of simple process, convenient operation and control and stable quality, and is used for realizing large-scale industrial production. (2) The metal product prepared by the invention can retain, adsorb and degrade PM2.5 inhalable substances through the micro-electrochemical function of the surface of the metal product, is beneficial to reducing the harm degree of haze and improving the urban air quality, and is beneficial to physical and psychological health of residents. (3) The detection method is very simple and effective, and can accurately know whether the metal product obtained by the preparation method has the effect of purifying the environment or not, reduce the resistance of popularization and application of the method, achieve the aims of being wide in short time and improving the air environment of people.

Detailed Description

The preparation method and the detection method of the metal product comprise a preparation method and a detection method, wherein the preparation method of the metal product comprises the following steps:

according to actual requirements, the metal material is subjected to the following procedures: blanking → forging → assembling, welding → coping → surface cleaning treatment → hot galvanizing → priming, polishing → surface cleaning treatment → electrostatic powder spraying or electrostatic paint spraying → sample piece detection → packaging → finished product, and finally obtaining the required metal product. This production process is a conventional general metal working process and therefore will not be described in detail.

In the above step, the surface cleaning treatment is performed by blowing oil-free dry air to the workpiece for 10 seconds.

The material for electrostatic powder spraying or electrostatic paint spraying comprises 85-92% of powder coating or paint agent coating for universal metal surfaces and 8-15% of functional powder, wherein the 8-15% of functional powder comprises 4-8% of cyclic silicate mineral, 1-2% of aluminum silicate potassium salt, 1-2% of titanium dioxide, 1% of quartz porphyrite and 1-2% of silicon oxide, and the particle size of each component of the functional powder is 1600 meshes.

And adding 8-15% of the functional powder into 85-92% of powder coating or paint agent coating for the universal metal surface, stirring for 5 minutes, and spraying on a workpiece by adopting a continuous electrostatic spraying method.

The technological parameters of the powder continuous electrostatic spraying technology are as follows:

① keeping the electrostatic high voltage in the range of 60-90 kV;

② the electrostatic current is between 10-20 muA;

③ the flow rate and pressure is 0.30-0.55 MPa;

④ the atomization pressure is 0.30-0.45 MPa;

⑤ the fluidization pressure of the powder supply barrel is 0.04-0.10 MPa;

⑥ the distance between the nozzle of the spray gun and the workpiece is 150-300 mm;

⑦ the speed of the conveying chain is 4.5-5.5 m/min;

⑧ the actual temperature of the oven is 180-200 ℃, and the curing time is 20-40 minutes.

The technological parameters of the continuous electrostatic spraying technology adopting the paint are as follows:

① the high voltage of the static generator is kept in the range of 30 KV-80 KV;

② the distance between the nozzle of the spray gun and the workpiece is 150-200 mm;

③ the paint pressure is 0-0.3 MPa;

④ the air pressure is 0.05-0.4 MPa;

⑤ the resistance value of the paint is 15-70M omega;

⑥ leveling time of paint is 5-20 minutes;

⑦ the actual temperature of the oven is 70-90 ℃, and the drying time is 20-60 minutes.

The detection method of the metal product comprises the following steps: the instruments tested were a Dylos DC1700 air quality monitor from the United states, a KEC900+ air quality monitor from Japan. During detection, the metal product sample obtained by the preparation method and the Dylos DC1700 air quality monitor are placed in a semi-sealed box with the volume of about 0.5m for 20 minutes of testing, so that the average particle number of inhalable substances in each cubic foot size can be observed.

And placing the metal product sample obtained by the preparation method and the KEC900+ air quality detector into a semi-sealed box with the volume of about 0.5m for carrying out the heavy planting, and detecting the number of negative oxygen ions released into the atmosphere by the sample in real time.

The first embodiment is as follows:

the metal product of the road guardrail is beneficial to retaining, adsorbing and degrading PM2.5 inhalable substances and improving the urban air quality, and the metal material is subjected to the following procedures according to the actual specification requirement: blanking → forging → assembling, welding → coping → surface cleaning treatment → hot galvanizing → priming, polishing → surface cleaning treatment → continuous electrostatic painting → sample piece detection → packaging → finished product, and finally obtaining the required metal product of the road guardrail.

The paint for continuous electrostatic painting is composed of 85% of paint agent coating for universal metal surfaces and 15% of functional powder, wherein the 15% of functional powder comprises the following components: 8% of a cyclic silicate mineral, 2% of potassium aluminosilicate, 2% of titanium dioxide, 2% of silicon oxide and 1% of quartz porphyry ore powder, the particle size of these components being about 1600 mesh. Adding 15% of functional powder into 85% of paint for the universal metal surface, stirring for 5 minutes by using a stirring instrument or a stirrer, and spraying the functional powder on the metal product of the road guardrail by adopting the continuous electrostatic spraying process to finally prepare the required metal product of the road guardrail. The technological parameters of the continuous electrostatic spraying technology are as follows:

① the high voltage of the static generator is kept in the range of 30 KV-80 KV;

② the distance between the nozzle of the spray gun and the workpiece is 150-200 mm;

③ the paint pressure is 0-0.3 MPa;

④ the air pressure is 0.05-0.4 MPa;

⑤ the resistance value of the paint is 15-70M omega;

⑥ leveling time of paint is 5-20 minutes;

⑦ the actual temperature of the oven is 70-90 ℃, and the drying time is 20-60 minutes.

Before hot galvanizing and paint spraying, oil-free dry air is adopted to respectively spray on the surface of the workpiece for 10 seconds so as to ensure the cleanness of the surface of the workpiece.

And placing the sample piece of the road guardrail metal product obtained after painting and a Dylos DC1700 air quality monitor instrument into a semi-sealed box with the volume of about 0.5m for carrying out 20-minute testing. The PM2.5 respirable placed on the painted swatches was reduced by 12-20% compared to the blank swatches before painting. And the number of the negative oxygen ions released into the atmosphere in real time by adopting the KEC900+ air quality detector produced in Japan is 1000/cm for carrying out the thin film cultivation.

Example two:

producing a building guardrail or railing metal product which is helpful for retaining, adsorbing and degrading PM2.5 inhalable substances and improving the urban air quality, and subjecting a metal material to the following procedures according to the actual specification requirement: blanking → forging → assembling, welding → coping → surface cleaning treatment → hot galvanizing → priming, polishing → surface cleaning treatment → continuous electrostatic powder spraying → sample piece detection → packaging → finished product, and finally obtaining the required metal product of the guardrail or the railing.

The powder coating for continuous electrostatic powder spraying consists of 90 percent of powder coating commonly used for metal products and 10 percent of functional powder, wherein the 10 percent of functional powder comprises the following components: 5% of cyclic silicate mineral, 2% of potassium aluminum silicate, 1% of titanium dioxide, 1% of silicon oxide and 1% of quartz porphyrite powder, wherein the particle size of each component is about 1600 meshes.

Adding 10% of functional powder into powder coating for universal metal surface with the dosage of 90%, stirring for 5 minutes by using a stirring instrument or a stirrer, and spraying the powder coating on the guardrail or railing metal product by adopting the continuous electrostatic spraying process to finally prepare the required guardrail or railing metal product.

The technical parameters of the continuous electrostatic powder spraying technology are as follows:

① keeping the electrostatic high voltage in the range of 60-90 kV;

② the electrostatic current is between 10-20 muA;

③ the flow rate and pressure is 0.30-0.55 MPa;

④ the atomization pressure is 0.30-0.45 MPa;

⑤ the fluidization pressure of the powder supply barrel is 0.04-0.10 MPa;

⑥ the distance between the nozzle of the spray gun and the workpiece is 150-300 mm;

⑦ the speed of the conveying chain is 4.5-5.5 m/min;

⑧ the actual temperature of the oven is 180-200 ℃, and the curing time is 20-40 minutes.

Before hot galvanizing and paint spraying, oil-free dry air is adopted to respectively spray on the surface of the workpiece for 10 seconds so as to ensure the cleanness of the surface of the workpiece.

And placing the sample piece of the guardrail or railing metal product obtained after painting and a Dylos DC1700 air quality monitor instrument into a semi-sealed box with the volume of about 0.5m for carrying out 20-minute testing. The PM2.5 respirable placed on the painted swatches was reduced by 12-20% compared to the blank swatches before painting. The number of the negative oxygen ions released into the atmosphere in real time by adopting the KEC900+ air quality detector produced in Japan is 800/cm for carrying out the thin film cultivation.

Example three:

producing a metal product for building exterior walls, which is helpful for retaining, adsorbing and degrading PM2.5 inhalable substances and improving urban air quality, and subjecting a metal material to the following procedures according to actual specification requirements: blanking → forging → assembling, welding → coping → surface cleaning treatment → hot galvanizing → priming, polishing → surface cleaning treatment → continuous electrostatic painting → sample piece detection → packaging → finished product, and finally obtaining the required metal product for the exterior wall of the horse building.

The paint for continuous electrostatic painting is composed of 92% of paint agent coating for universal metal surfaces and 8% of functional powder, wherein the 8% of functional powder comprises the following components: 4% of a cyclic silicate mineral, 1% of potassium aluminosilicate, 1% of titanium dioxide, 1% of silicon oxide and 1% of quartz porphyry ore powder, the particle size of these components being about 1600 mesh. Adding 8% of functional powder into 92% of general paint for metal surfaces, stirring for 5 minutes by using a stirring instrument or a stirrer, and spraying the functional powder on a metal product for the building exterior wall by adopting the continuous electrostatic spraying process to finally prepare the required metal product for the building exterior wall. The technological parameters of the continuous electrostatic spraying technology are as follows:

① the high voltage of the static generator is kept in the range of 30 KV-80 KV;

② the distance between the nozzle of the spray gun and the workpiece is 150-200 mm;

③ the paint pressure is 0-0.3 MPa;

④ the air pressure is 0.05-0.4 MPa;

⑤ the resistance value of the paint is 15-70M omega;

⑥ leveling time of paint is 5-20 minutes;

⑦ the actual temperature of the oven is 70-90 ℃, and the drying time is 20-60 minutes.

Before hot galvanizing and paint spraying, oil-free dry air is adopted to respectively spray on the surface of the workpiece for 10 seconds so as to ensure the cleanness of the surface of the workpiece.

And placing the sample piece of the metal product for the building outer wall obtained after painting and a Dylos DC1700 air quality monitor instrument into a semi-sealed box with the volume of about 0.5m for carrying out 20 minutes of test. The reduction in PM2.5 respirable placed on the painted swatches was 10-15% compared to the blank swatches before painting. The number of the negative oxygen ions released into the atmosphere in real time by adopting the KEC900+ air quality detector produced in Japan is 300-500/cm for carrying out the thin film cultivation.

Claims (1)

1. A preparation method and a detection method of a metal product are characterized in that the preparation method of the metal product comprises the following steps:

according to actual requirements, the metal material is subjected to the following procedures: blanking → forging → assembling, welding → coping → surface cleaning treatment → hot galvanizing → priming, polishing → surface cleaning treatment → electrostatic powder spraying or electrostatic paint spraying → sample piece detection → packaging → finished product, and finally obtaining the required metal product;

in the above process, the surface cleaning treatment is to blow oil-free dry air to the workpiece for 10 seconds;

the material for electrostatic powder spraying or electrostatic paint spraying comprises 85-92% of powder coating or paint agent coating for a universal metal surface and 8-15% of functional powder, wherein the 8-15% of functional powder comprises 4-8% of cyclic silicate mineral, 1-2% of aluminum silicate potassium salt, 1-2% of titanium dioxide, 1% of quartz porphyrite and 1-2% of silicon oxide, and the particle size of each component of the functional powder is 1600 meshes;

adding the 8-15% of the functional powder into 85-92% of powder coating or paint agent coating for the universal metal surface, stirring for 5 minutes, and spraying and coating the workpiece by adopting a continuous electrostatic spraying method;

the technological parameters of the powder continuous electrostatic spraying technology are as follows:

① keeping the electrostatic high voltage in the range of 60-90 kV;

② the electrostatic current is between 10-20 muA;

③ the flow rate and pressure is 0.30-0.55 MPa;

④ the atomization pressure is 0.30-0.45 MPa;

⑤ the fluidization pressure of the powder supply barrel is 0.04-0.10 MPa;

⑥ the distance between the nozzle of the spray gun and the workpiece is 150-300 mm;

⑦ the speed of the conveying chain is 4.5-5.5 m/min;

⑧, the actual temperature of the oven is 180-200 ℃, and the curing time is 20-40 minutes;

the technological parameters of the continuous electrostatic spraying technology adopting the paint are as follows:

① the high voltage of the static generator is kept in the range of 30 KV-80 KV;

② the distance between the nozzle of the spray gun and the workpiece is 150-200 mm;

③ the paint pressure is 0-0.3 MPa;

④ the air pressure is 0.05-0.4 MPa;

⑤ the resistance value of the paint is 15-70M omega;

⑥ leveling time of paint is 5-20 minutes;

⑦, the actual temperature of the oven is 70-90 ℃, and the drying time is 20-60 minutes;

the detection method of the metal product comprises the following steps: the detection instruments are Dylos DC1700 air quality monitor produced in America, KEC900+ air quality detector produced in Japan; during detection, the metal product sample obtained by the preparation method and a Dylos DC1700 air quality monitor are placed in a semi-sealed box with the volume about 0.5m for 20 minutes to observe the average particle number of inhalable substances in each cubic foot size;

and placing the metal product sample obtained by the preparation method and the KEC900+ air quality detector into a semi-sealed box with the volume of about 0.5m for carrying out the heavy planting, and detecting the number of negative oxygen ions released into the atmosphere by the sample in real time.