Description
Estimated time: 0:45 hours
Language: English
Summary of the lecture
This course is based on the Alloy Selection for Service in Hydrogen Fluoride, Hydrofluoric Acid and Fluorine (No. 10074).
It provides essential guidance for engineers and materials professionals involved in the design, fabrication, and operation of equipment exposed to hydrogen fluoride (HF), hydrofluoric acid, and fluorine. The course summarizes the corrosion behavior of carbon steels, stainless steels, nickel alloys, copper-based alloys, and other metals, detailing the effects of concentration, temperature, velocity, contaminants, and environmental conditions on material performance. Emphasis is placed on selecting safe, reliable, and cost-effective alloys for these highly reactive and hazardous chemical environments.
What you will learn:
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- Understand the fundamental corrosion mechanisms governing metal performance in anhydrous HF, aqueous HF solutions, and fluorine—including protective fluoride film formation, velocity effects, hydrogen-related damage, and oxygen-induced attack.
- Explain the behavior of major alloy families (carbon steel, stainless steels, nickel alloys, copper-nickel alloys, and precious metals) and how composition, fabrication, and temperature–concentration conditions determine suitability.
- Differentiate key nickel-containing alloys and stainless steels used in HF and fluorine environments, recognizing limitations such as stress-corrosion cracking, weld-metal sensitivity, and oxygen-accelerated corrosion.
- Evaluate the effects of contaminants, moisture, flow velocity, and temperature on corrosion rates, protective film stability, and failure risks in HF and fluorine service.
- Identify appropriate materials of construction for specific HF- and fluorine-handling equipment, including piping, pumps, valves, storage vessels, vaporizers, plant utilities, and fluorine transfer systems.
- Interpret corrosion data and iso-corrosion charts provided for nickel alloys and stainless steels to establish safe operating conditions and select optimal alloys.
Course includes
- 1 Lesson
- Steel Applications
