Description
Estimated time: 0:30 hours
Language: English
Summary of the lecture
The course presents key principles for selecting stainless steels and nickel-containing alloys for nitric acid service. It explains how nitric acid is produced, outlines the corrosion behaviour of various alloy families, and details how composition, microstructure, and operating conditions influence performance. The text also compares grades across a wide range of concentrations and temperatures, highlights challenges such as intergranular corrosion and stress-corrosion cracking, and offers guidance for choosing materials used in equipment throughout nitric acid plants.
What you will learn:
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- Describe the nitric acid production process and identify points where corrosion control is essential.
- Differentiate between the corrosion resistance of ferritic, austenitic, duplex, silicon-alloyed stainless steels, and nickel alloys in nitric acid environments.
- Explain how alloying elements such as chromium, molybdenum, silicon, and nickel affect corrosion performance.
- Identify conditions that promote intergranular corrosion, pitting, crevice corrosion, sigma-phase formation, or stress-corrosion cracking.
- Select appropriate materials for equipment such as absorbers, condensers, coolers, storage tanks, heaters, and distillation units.
- Evaluate when higher-alloyed materials (e.g., Alloy 20, C-22, G-30, 690, 825) are required for severe or mixed-acid conditions.
- Apply alloy-selection principles to industrial sectors that use nitric acid, including fertilizer production, chemical processing, nuclear fuel reprocessing, and metal pickling.
Course Content
Not Enrolled
Course includes
- 1 Lesson
- Steel Applications
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