Vanconol® RF-402 Refinery Tower Top Corrosion Inhibitor
1. Abstract
Vanconol® RF-402 is a high-efficiency corrosion inhibitor specifically designed for core refinery units (atmospheric and vacuum distillation towers, delayed coking units, hydrogenation units). It is suitable for working conditions with a temperature < 180℃ and specifically addresses low-temperature corrosion issues caused by the HCl-H₂S-H₂O system. Through heteroatoms such as N and metal-philic anchoring groups in the molecule, a dense monomolecular adsorption film is formed on the metal surface, which double blocks the contact of corrosive media and the diffusion of H ions, significantly slowing down the electrode reaction rate. It effectively inhibits uniform corrosion, pitting corrosion and other phenomena, and is especially suitable for severe corrosion areas such as two-phase transition zones. It extends the service life of equipment, reduces maintenance costs and safety risks, and ensures stable and efficient operation of the units.
2. Core Product Information
Item Name | Technical Indicators (RF-402 Coking Type) | Technical Indicators (RF-402 Sinopec Version) | Test Method |
Appearance | Pale yellow liquid | Pale yellow liquid | Visual inspection |
Water Solubility | No phase separation | No phase separation | Visual inspection |
Density (d₂₀) (g/cm³) | 0.90-1.10 | 0.90-1.10 | GB/T 13378 |
Kinematic Viscosity (mm²/s) | ≤80 (40℃) | ≤80 (40℃) | GB/T 265 |
Pour Point (℃) | ≤-20 | ≤-20 | GB/T 510 |
Corrosion Inhibition Rate (%) | ≥90% | ≥80% | - |
Note: Corrosion inhibition rate test standard for coking type: Q/SHCG 110—2017; Corrosion inhibition rate test standard for Sinopec version: Luoyang Petrochemical method; |
Main Features and Advantages
Targeted Protection: Precisely suitable for the overhead system of atmospheric and vacuum distillation units, the reaction effluent system of hydrogenation units, the overhead system of fractionating towers in catalytic cracking units, and circulating water systems. It focuses on protecting equipment and pipelines such as overhead circulating heat exchangers, overhead heat exchangers, and air coolers, specifically addressing uniform corrosion and pitting corrosion under working conditions < 150℃.
High Efficiency and Low Consumption: Molecules quickly form a coordination bond adsorption film with excellent corrosion inhibition efficiency; a dosage of 15ppm can meet the Q/SHCG 110—2017 standard (corrosion inhibition rate ≥80%), which is far better than competitors that require more than 40ppm. Under actual continuous injection conditions, it can still meet the standard as low as 5ppm, greatly reducing usage costs.
Reliable Mechanism: The monomolecular adsorption film double blocks the diffusion of corrosive media and H ions, fundamentally slowing down the electrode reaction. The corrosion inhibition effect is stable and long-lasting, suitable for the complex HCl-H₂S-H₂O corrosion system.
Flexible Operation: Supports dilution and preparation; the dosage can be adjusted according to the content of corrosive media in oil products. The economic dosage can be determined through laboratory tests to meet the needs of different refinery working conditions.
3. Application Guide
3.1 Recommended Application Fields
Vanconol® RF-402 Corrosion Inhibitor focuses on low-temperature corrosion protection in refineries (operating temperature < 180℃, core suitable for < 150℃). It is applicable to core equipment such as atmospheric and vacuum distillation towers, delayed coking units, hydrogenation units, and catalytic cracking units. It focuses on protecting overhead circulating heat exchangers, overhead heat exchangers, air coolers and related pipelines, effectively solving corrosion caused by ammonium chloride salt formation and blockage, hydrogen sulfide corrosion and other problems, and ensuring continuous and stable operation of the units.
3.2 Usage Methods and Recommended Dosage
Pre-operation Preparation: Check if the product in the packaging barrel is in a molten state. If solidified, it needs to be preheated and melted in advance.
Dilution and Preparation: Taking a 20% concentration injection solution as an example, extract 200kg of this product into a clean mixing tank with stirring, then add 800kg of demineralized water, stir until it becomes a homogeneous liquid. Take a sample for observation; it is considered qualified if there is no stratification. The dilution ratio can be adjusted according to on-site needs.
Dosage Calculation: Under standard working conditions, the effective substance dosage is ≥15ppm (to meet the corrosion inhibition rate ≥80%). Under actual continuous injection conditions, it can be as low as 5ppm. Use a metering pump for continuous injection.
Usage Monitoring: Regularly detect the iron ion content in cooling water to ensure it is < 3ppm. According to the difference in the content of corrosive media in oil products, determine the economic dosage through laboratory tests and adjust the injection volume in a timely manner.
4. Safety and Storage
Safe Operation: Wear protective gloves and goggles during use to avoid direct contact with skin and eyes. In case of accidental contact, immediately rinse with a large amount of clean water and seek medical help if necessary.
Storage Conditions: The product should be stored in a clean, cool and dry warehouse, away from direct sunlight, high temperature and fire sources. During storage and transportation, it is necessary to protect from sunlight, fire, moisture and collision.
Packaging and Shelf Life: The product is packaged in plastic barrels with a net content of 220L per barrel. Other packaging can be customized according to user requirements. The shelf life is one year at room temperature. The remaining product after use should be sealed and stored to prevent volatilization.
5. Frequently Asked Questions (FAQ)
Q: What are the core advantages of RF-402 Corrosion Inhibitor?
A: The core advantage is high efficiency and low consumption. A dosage of 15ppm can meet the Q/SHCG 110—2017 standard (corrosion inhibition rate ≥80%), while competitors require more than 40ppm. Under actual continuous injection conditions, it can still meet the iron ion control requirements as low as 5ppm, greatly reducing usage costs. Moreover, it is targeted to adapt to various low-temperature corrosion scenarios in refineries.
Q: Which specific equipment and working conditions is RF-402 Corrosion Inhibitor suitable for?
A: It is suitable for refinery units with an operating temperature < 180℃ (core < 150℃), including the overhead system of atmospheric and vacuum distillation units, the reaction effluent system of hydrogenation units, the overhead system of fractionating towers in catalytic cracking units, and circulating water systems. It focuses on protecting equipment and pipelines such as overhead circulating heat exchangers, overhead heat exchangers, and air coolers, and copes with corrosion caused by the HCl-H₂S-H₂O system.
Q: How to scientifically determine the usage amount of RF-402 Corrosion Inhibitor?
A: The initial recommended dosage under standard working conditions is ≥15ppm, and it can be as low as 5ppm in actual continuous injection. The specific dosage needs to be determined through laboratory tests according to the content of corrosive media in oil products. During use, it is necessary to monitor the iron ion content in cooling water (< 3ppm) and adjust the injection volume accordingly to balance corrosion inhibition effect and economy.
6. Contact Us and Information Acquisition
For more detailed technical parameters, test reports, sample applications or technical support about Vanconol® RF-402 Refinery Tower Top Corrosion Inhibitor, please contact our customer representative. We will provide you with professional customized solutions and comprehensive services.
Contact: Cary Lee
Email: cary.lee@surfychem.com
Mobile: +86 18526487936
