گفتي نيكل، ياد سوپر آلياژ Hastelloy افتادم. بعضي مدلهاي اين آلياژ يه شرايطي رو تحمل ميكنه كه آدم واقعاً تعجب ميكنه.
بايست بگم، اين سوپر آلياژ از بيس نيكل و اديتيوهاي موليبدن يا كروم يا آهن و.... تشكيل شده.
ويژگي منحصر بفردشم قابليت تحمل خوردگيه.
The primary function of the Hastelloy super alloys is that of effective survival under high-temperature, high-stress service in a moderately to severely corrosive, and/or erosion-prone environment where more common and less expensive iron-based alloys would fail, including the
pressure vessels of some
nuclear reactors,
chemical reactors, distillation equipment, and pipes and valves in chemical industry. Although a super alloy, Hastelloy does experience degradation due to fabricating and handling.
Electropolishing or
passivation of Hastelloy can improve corrosion resistance
The predominant alloying ingredient is typically the
transition metal nickel. Other alloying ingredients are added to nickel in each of the subcategories of this trademark designation and include varying percentages of the elements
molybdenum,
chromium,
cobalt,
iron,
copper,
manganese,
titanium,
zirconium,
aluminum,
carbon, and
tungsten.
Ref: Wikipedia.com
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