Anodic Protection Acid Unit with Electrochemical Passivation for Uniform Fluid Dispersion and Corrosion Resistance

The Anodic Protection Acid Unit is a specialized assembly engineered for controlled movement of concentrated sulfuric acid (exceeding 96%) and oleum within industrial processing contexts. This system is typically positioned in sulfuric acid alkylation sections within petroleum refining complexes and absorption/drying segments of acid production plants.

This assembly fulfills two essential functional requirements: providing even fluid dispersion across the vessel's interior volume while utilizing electrochemical passivation techniques to withstand corrosive acid environments.

• Technical Rationale: A controlled electrical charge is maintained on the metal surface, keeping its potential within a stable passive region. This condition promotes establishment and continuation of an uninterrupted, tightly adhering protective film that separates base metal from aggressive acid medium.
• Operational Result: This methodology restricts material deterioration to insignificant levels (frequently less than 0.1 mm annually), extending equipment useful life and eliminating metal contamination of processed acid.

• Material Content: Fabricated from austenitic stainless steel grades (including 304L and 316L) chosen for suitable reaction to anodic treatment and ability to resist acid attack
• Flow Characteristics: Utilizes carefully established weir heights and opening sizes to preserve uniform liquid distribution throughout entire operating envelope
• Erection Procedure: Produced in manageable sections that fit through standard vessel entry points, permitting internal assembly without field welding operations
• Electrical Configuration: Contains purpose-located electrode elements within acid pathway to finalize protective circuit without affecting distribution performance

• Prolonged Service Period: Reduces ongoing maintenance needs through effective limitation of corrosion-induced material loss
• Acid Quality Retention: Prevents introduction of metal particles into acid stream, meeting purity criteria for sensitive subsequent processes
• Process Efficiency: Ensures consistent wetting of column internals, supporting maximum mass transfer and separation capabilities
• Mechanical Resilience: Maintains structural strength during continuous operation under aggressive chemical conditions and elevated temperatures

• Alkylation Operations Using Sulfuric Acid as Catalytic Agent
• Moisture Extraction and Vapor Absorption Columns in Acid Manufacturing
• Acid Temperature Regulation and Recirculation Systems
• Critical Acid Containment and Transfer Facilities