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Petroleum coke, a comprehensive introduction to petroleum coke in the cathodic protection industry

Cathodic protection petroleum coke

Petroleum coke is a type of byproduct that is produced in the process of producing crude oil and natural gas. This material is obtained as a solid and coated with an anodic mixture. Petroleum coke has properties and characteristics that make it a suitable choice for use in cathodic protection.

The formation of petroleum coke in the process of cathodic protection is that in the active cathodic protection system, electric current is applied from the power source to the surface of the protected metal. This electric current creates a negative electric potential on the surface of the metal, which controls the oxidation process. In this process, the electric current is directed to the cathodic surface (end point of the current) and at this stage, petroleum coke may be formed.

What are the types of petroleum coke in the cathodic protection industry?

In the cathodic protection industry, there are different types of petroleum coke for use in cathodic protection processes. Each type of petroleum coke has its own characteristics and uses. Below I will mention some types of petroleum coke in the cathodic protection industry:

1. Reinforced petroleum coke type: This type of petroleum coke includes petroleum coke that has been strengthened using various additives and compounds. This type of petroleum coke usually has higher corrosion resistance, improved electrochemical properties, and greater cathodic retention.

2. Type of petroleum coke containing antifungal: this type of coke includes compounds that have antifungal properties in addition to cathodic protection. Antifungals prevent the formation of undesirable deposits such as hydrogen sulfide and the formation of a protective film on the cathodic surface.

3. Petroleum coke type with antibacterial properties: Some types of coke in cathodic protection have antibacterial properties. This type of petroleum coke controls microbes and prevents the formation of biological deposits on the cathode surface by using antimicrobial compounds such as antibacterials and antifungals.

4. Petroleum coke type with electrochemical anti-corrosion properties: This type of coke has high electrochemical anti-corrosion properties and improves the ability to maintain and protect the cathodic surface.
Also, in the cathodic protection industry, there are other types of petroleum coke that aim to improve cathodic protection performance. These include types containing polymer materials, types with waterproof properties, types with heat resistance properties, etc.

According to various industrial needs and conditions, the correct selection of petroleum coke type is very important in cathodic protection. Accurate assessment of cathodic surface needs and use of the appropriate petroleum coke type will help protect and safety of oil and gas equipment and lead to longer useful life and reduced maintenance and repair costs.

Petroleum coke in the cathodic protection industry:

The oil and gas industry is one of the industries where cathodic protection is considered one of the critical issues. Due to the destructive effect of corrosion on pipes and equipment, the importance of cathodic protection in this industry is necessary to create reliability and stability.

One of the methods used in cathodic protection is the use of petroleum coke. In this description, we will take a comprehensive look at petroleum coke in the cathodic protection industry.

The advantages of using petroleum coke for cathodic protection are:

  1. High resistance to corrosion: petroleum coke has a very high resistance to corrosion. This property causes petroleum coke to be placed on the metal surface as a protective layer and significantly reduces corrosion.
  2. High durability: due to its solid structure, petroleum coke is more resistant to weather conditions and environmental factors than other methods of cathodic protection. This feature increases the useful life of cathodic protection.

The disadvantages of using petroleum coke for cathodic protection include the following:

  1. Formation of uneven layers: The use of coke may lead to the formation of uneven layers on the metal surface. These layers can increase the electrical resistance of the metal surface and, as a result, reduce the efficiency of cathodic protection.
  2. Problems with uniform coating: Uniform distribution of coke on the metal surface may cause problems. Irregularity in petroleum coke distribution can cause weak points in cathodic protection and lead to increased corrosion in these points.
  3. Need for maintenance and replacement: Over time, coke is affected by environmental conditions and chemical processes and may need to be replaced and maintained. This issue may result in additional costs and time-consuming.

In general, the use of coke as a cathodic protection method has its advantages and disadvantages, and its choice depends on the environmental conditions, specific needs, and desired goals. Before using petroleum coke, its advantages and disadvantages regarding cathodic protection should be carefully evaluated.

Methods of using petroleum coke in cathodic protection

These methods include the use of coke in powder form, coke coating on the cathodic surface, and combinations of petroleum coke with other materials.

The methods of using coke in cathodic protection are:

  • Using petroleum coke in powder form: In this method, coke in powder form is used as a protective material. Petroleum coke powder is placed as a layer on the metal surface and acts as a protective and corrosion-resistant layer. Petroleum coke powder is placed as a layer on the metal surface and acts as a protective and corrosion-resistant layer.
  • Coating petroleum coke on the cathodic surface: In this method, coke is placed on the cathodic surface as a layer. This petroleum coke layer can be placed directly on the metal surface or attached to the metal surface through lubricants (such as resins). This method, in addition to cathodic protection, can reduce heat transfer from the metal surface and in some cases also act as a thermal insulator.
  • Combinations of petroleum coke with other materials: In some cases, coke is combined with other materials such as resins, polymers or oils to create a better combination for cathodic protection. These compounds can have better mechanical and chemical properties and improve cathodic protection performance.

In general, each method of using coke for cathodic protection has its own characteristics and advantages. Using coke in powder form is suitable for environments that require uniform distribution, and this method can reduce maintenance and replacement costs. Petroleum coke coating on the cathodic surface, in addition to cathodic protection, can prevent the evaporation and erosion of petroleum coke and in some cases also improve the performance of thermal insulation. Blends of petroleum coke with other materials can also provide better mechanical and chemical properties and improve cathodic protection performance.

However, various factors should be considered in choosing the appropriate method for using coke in cathodic protection. These factors include physical and chemical characteristics of the environment, specific system requirements, expected useful life, and budget required for coke maintenance and replacement. Also, the need for careful tests and evaluations before using coke is necessary to ensure that the chosen method is fully suitable in terms of performance and safety.

By considering the advantages and disadvantages of using coke and according to the specific conditions of each industry and system, an appropriate method for cathodic protection can be chosen.

In the field of using coke for cathodic protection, there are some case studies and real applications. Below are some examples of industrial projects that have used coke for cathodic protection:

  • Oil and gas pipeline protection project: Coke has been used as a protective coating in some oil and gas pipeline protection projects. Due to its high resistance to corrosion and better tolerance of environmental conditions, this coke coating is placed as a protective layer on the inner surface of pipelines and increases their useful life.
  • Industrial equipment protection project in corrosive environments: In some industries, there are environments that are affected by industrial equipment due to strong corrosiveness and harsh conditions. In these cases, the use of coke as a coating or combination with other materials can reduce corrosion and increase the useful life of the equipment.
  • Marine and coastal structures protection project: In marine structures such as bridges, ports and oil platforms, the protection of cathodic surfaces is very vital. In some projects, coke has been used as a powder or coating on the metal surface of these structures to prevent corrosion and corrosion of the metal surface and to increase the useful life of the structure.

The results obtained from these projects have shown that the use of coke as a cathodic protection material has a positive effect on reducing corrosion and increasing the useful life of equipment. Some of the results obtained include the following:

  • Reducing the corrosion rate: Using coke as a cathodic protection material can significantly reduce the corrosion rate of the metal surface. As a corrosion-resistant layer, this protective material provides effective protection against polluting environmental factors and increases the useful life of the equipment.
  • Improving mechanical strength: coke can increase the strength and resistance of the metal surface due to its strong mechanical properties. This can reduce the risk of material failure and fatigue at the cathodic level and improve the performance and safety of the equipment.
  • Reducing the cost of maintenance: using coke as a cathodic protection material can reduce the cost of maintenance and replacement of equipment. Because by increasing the useful life of the equipment, the need for replacement and repair is reduced and maintenance costs are reduced.
  • Increasing productivity and performance of systems: Correct cathodic protection using coke leads to increased productivity and performance of systems. By reducing the corrosion and fatigue of the materials, the useful life of the systems increases and the problems caused by the corrosion and failure of the cathodic surfaces are minimized, which ultimately improves the efficiency and performance of the systems.

According to case studies and real applications of coke in cathodic protection, the results of these projects show that the use of petroleum coke can act as an effective method in protecting and increasing the useful life of cathodic surfaces.

Considering the environmental characteristics and system requirements, the appropriate choice of coke usage method can help improve efficiency, reduce costs, and increase equipment safety. With continued research and detailed investigations, more improvements can be made in the field of using coke in cathodic protection and more optimal methods can be used.

Technical points and implementation process In this section, technical points related to the use of coke in cathodic protection are reviewed. Implementation steps, preparation of the cathodic surface before using coke, methods of coke application and implementation, and environmental conditions required for the best performance of this method are reviewed.

We discuss the technical points and implementation process of using coke in cathodic protection. Below are the important points that should be considered in this regard:

1. Cathodic surface preparation: Before using coke, the cathodic surface must be properly prepared. This includes cleaning the surface, removing contaminants and oils, and creating a clean, dry surface. This work is done using mechanical methods such as sandblasting, brushing, and using detergents.

2. Methods of applying petroleum coke: Coke can be applied as a powder on the cathodic surface, as a thin coating or used in combination with other materials to create a protective layer. The method of applying petroleum coke should be determined according to the type and conditions of the cathodic surface as well as the system requirements.

3. Environmental conditions: For the best performance of using coke in cathodic protection, there are important environmental conditions. For example, temperature, humidity, pH, and the presence of chemicals in the environment must be considered. Examining the environmental conditions can help determine the appropriate coke type and set the optimal implementation conditions.

4. Implementation stages: The implementation stages of using coke include preparation of the cathodic surface, application of coke, drying and stabilization of coke, and performance evaluation and quality control. Also, to achieve better results and maximum effectiveness, it is necessary to follow the relevant guidelines and standards in the implementation of the cathodic protection process using coke.

As a result, the correct and accurate implementation of technical procedures and compliance with suitable environmental conditions, along with continuous performance control and evaluation of results, can help to improve the performance of cathodic protection and increase the useful life of cathodic surfaces. Paying attention to technical details and using quality equipment and materials, including coke with desirable properties, is of great importance.

Petroleum coke analysis of cathodic protection industry

TYPE 3TYPE 2TYPE 1عناصر
95%Min90%Min80%Minکربن (C)
2%Max5%Max15%Maxخاکستر (ASH)
2%Max5%Max5%Maxمواد فرار (V)
2%Max5%Max5%Maxرطوبت (M)
1%Max5%Max1%Maxگوگرد (S)
0.1 ohm/cm100 ohm/cm100 ohm/cmresisivity
700-1100 kg/cm700-1100 kg/cm700-1100 kg/cmdennsity
0.2-1 mm0.5-3 mm1-10 mmسایز (SIZE)