Integripedia Topic
Sulfuric Acid Corrosion
Sulphuric Acid Corrosion is an acidic environment "disease" commonly occurring in sulfuric acid alkylation units where process control or water contents of acids deviate from design operation. As with HF alkylation units, sulfuric acid carryover into equipment and piping systems that were not constructed to resist sulfuric acid at certain concentrations and temperatures can lead to higher corrosion rates. Reactor effluent lines, reboilers, deisobutanizer overheads, caustic treating systems, and flare lines are particularly vulnerable. However, with rigid control of acid concentration, fluid velocity, temperature and the avoidance of acid carryover, sulfuric acid alkylation units can be operated reliably with high integrity.
Related Topics
- Amine Stress Corrosion Cracking (SCC)
- Ammonia Stress Corrosion Cracking
- Brittle Fracture
- Carburization
- Caustic Stress Corrosion Cracking (Caustic Embrittlement)
- Cavitation
- Chloride Stress Corrosion Cracking
- CO2 Corrosion
- Cooling Water Corrosion
- Corrosion Fatigue
- Corrosion Under Insulation (CUI)
- Cracking
- Decarburization
- Embrittlement
- Erosion Corrosion
- Fatigue (Material)
- Graphitization
- High Temperature Hydrogen Attack (HTHA)
- Hydrochloric (HCl) Acid Corrosion
- Hydrofluoric (HF) Acid Corrosion
- Hydrogen Blistering
- Hydrogen Embrittlement
- Hydrogen Induced Cracking (HIC)
- Hydrogen Stress Cracking
- Liquid Metal Embrittlement (LME)
- Metal Dusting
- Microbiologically Induced Corrosion (MIC)
- Naphthenic Acid Corrosion (NAC)
- Phosphoric Acid Corrosion
- Polythionic Acid Stress Corrosion Cracking (PASCC)
- Spheroidization (Softening)
- Stress Assisted Corrosion
- Stress-Oriented Hydrogen Induced Cracking (SOHIC)
- Sulfidation Corrosion
- Thermal Fatigue
- Vibration-Induced Fatigue
- Wet H2S Damage
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Unlike NAC where we’re still on a learning curve, the knowledge of corrosion by sulfuric acid has not changed much in the last quarter century, and there are many good references for it included in API RP 571.
Inspectioneering and API have teamed up to create the Mechanical Integrity Professional Initiative. The goal of this project is to raise the benchmark on industry knowledge and develop the next generation of SMEs. We believe that equipping MI...
The U.S. Chemical Safety Board released its final report into multiple sulfuric acid releases that occurred in 2014 at the Tesoro Refinery in Martinez, CA. The report includes key process safety findings related to safety culture, safety indicators,...
The U.S. CSB released a report on tubing samples taken from the Tesoro Refinery in Martinez, California, concluding that a sulfuric acid spill resulted from insufficient tightening between a tube and a compression joint at a sulfuric acid sampling...
How is reliability affecting your bottom line? Download our Economics of Reliability report, where Pinnacle analysts take data from the oil refining industry and dive into how that key sector is being affected by reliability today.
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