1. Cost of coating anti-corrosion technology

Three layer polyethylene (3PE) coating:

Material cost: The cost of 3PE coating material is relatively reasonable. It is mainly composed of epoxy powder, adhesive, and polyethylene. Generally speaking, the material cost is around 30-50 yuan/square meter, and the specific price may vary depending on the brand, quality, and market fluctuations of the raw materials.

Construction cost: The construction process is relatively mature, including surface pretreatment, electrostatic spraying of epoxy powder, adhesive coating, and polyethylene extrusion. The construction cost mainly includes equipment depreciation, labor and energy consumption, etc., which is approximately 20-30 yuan/square meter. So the total cost of 3PE coating is approximately 50-80 yuan/square meter.

Thermal spray ceramic coating:

Material cost: Ceramic powder materials are relatively expensive due to their special performance requirements. The cost of thermal spray ceramic coating materials may be around 100-200 yuan/square meter, especially for some high-performance ceramic materials, the cost will be even higher.

Construction cost: Thermal spraying equipment is relatively expensive and requires high construction technology. The construction process involves high-temperature spraying, which requires professional technicians to operate, resulting in high labor costs and equipment losses. The construction cost may be around 80 to 120 yuan per square meter. Therefore, the total cost of thermal spray ceramic coating is approximately 180320 yuan/square meter.

Nano composite coating:

Material cost: Nanomaterials themselves are relatively expensive, and adding them to coatings to make nanocomposite coatings will increase material costs. The cost of nanocomposite coating materials is approximately 80 to 150 yuan per square meter.

Construction cost: The construction process is similar to ordinary coatings, but requires stricter control over the construction environment and process to ensure the uniform distribution of nanomaterials and coating performance. The construction cost is approximately 30-50 yuan per square meter. So the total cost of nanocomposite coatings is approximately 110 to 200 yuan per square meter.

2. Cost of lining anti-corrosion technology

Fiberglass reinforced plastic (FRP) lining:

Material cost: The cost of FRP materials varies depending on factors such as material thickness and fiber content. The general material cost is around 100-150 yuan/square meter.

Construction cost: FRP lining construction requires professional winding or molding equipment, and the process is complex, including multiple steps such as mold making, fiber winding, and curing. The construction cost is relatively high, about 100-150 yuan/square meter. Therefore, the total cost of FRP lining is approximately 200 to 300 yuan per square meter.

Polytetrafluoroethylene (PTFE) lining:

Material cost: PTFE material is relatively expensive, with a material cost of approximately 200 to 300 yuan per square meter.

Construction cost: The installation process of PTFE lining requires high requirements, such as using lining pasting or winding methods, which require special tools and techniques. The construction cost is approximately 150-200 yuan per square meter. So the total cost of PTFE lining is approximately 350 to 500 yuan per square meter.

3. Cost of electrochemical anti-corrosion technology

Sacrificial anode cathodic protection:

Material cost: The price of sacrificial anode materials (such as zinc alloys, aluminum alloys, etc.) varies due to factors such as metal purity and market supply and demand. Taking zinc alloy sacrificial anode as an example, the material cost is approximately 30-50 yuan/kg. For an LSAW Steel Pipe that requires protection, calculate the weight of the sacrificial anode required based on the pipe size, length, and protection period, and then calculate the material cost.

Installation and maintenance costs: The installation of sacrificial anodes is relatively simple, but requires regular inspection and replacement. The installation and maintenance costs include labor costs for anode installation, regular testing fees, etc., which are approximately 10-20 yuan/square meter per year (calculated based on the protected area).

External current cathodic protection:

Equipment and material costs: The external current cathodic protection system includes equipment and materials such as potentiometers, auxiliary anodes, reference electrodes, etc. The price of a potentiostat varies from 2000 to 5000 yuan per unit depending on the power level, while the cost of auxiliary anode materials is approximately 100 to 200 yuan per square meter, and the price of a reference electrode is 100 to 300 yuan per unit. For a pipeline cathodic protection system, equipment and material costs vary depending on the length and complexity of the pipeline.

Installation and operation maintenance costs: System installation requires professional personnel for wiring, equipment debugging, etc., resulting in high installation costs. During operation, it is necessary to consume electrical energy and regularly maintain the equipment to ensure normal operation. The installation and operation maintenance costs are approximately 30-50 yuan per square meter per year (calculated based on the protected area).

4. Cost of intelligent cathodic protection system:

Equipment and material costs: The intelligent cathodic protection system adds intelligent monitoring and control equipment such as sensors, data collectors, controllers, etc. on the basis of the ordinary external current cathodic protection system. These devices are relatively expensive, and the cost of the entire system equipment and materials may be 50% or 100% higher than that of ordinary external current cathodic protection systems.

Installation and operation maintenance costs: The installation process is more complex and requires debugging and calibration of smart devices. The operation and maintenance costs are also relatively high, including expenses for data processing, remote monitoring, etc., which are approximately 50-80 yuan/square meter per year (calculated based on the protected area).