Hastelloy B: Corrosion-Resistant Vanguard wɔ Reductive Corrosive Nneɛma a Atwa Yɛn Ho Ahyia mu
Dec 23, 2025
Sɛ́ nickel-molybdenum-based corrosion-resistant alloy, Hastelloy B abɛyɛ ade titiriw wɔ nnwuma te sɛ nnuruyɛ mfiridwuma ne petroleum a wɔde di nneɛma a atwa yɛn ho ahyia a ɛyɛ hyew kɛse ho dwuma, esiane ne adwumayɛ soronko wɔ reductive acid media mu nti. Mfaso a ɛwɔ so no da adi titiriw bere a wɔde toto nneɛma a wɔde afrafra a ɛte saa ara ho no.
Wɔ reductive acid mmeae te sɛ hydrochloric acid ne dilute sulphuric acid mu no, Hastelloy B a ɛko tia nsɛe no nyɛ hwee sɛ "benchmark." Nea ɛnte sɛ 316L dade a ɛnyɛ den a ɛhu amane wɔ nsɛe ntɛmntɛm wɔ medium-concentration hydrochloric acid mu no, Hastelloy B tumi yɛ adwuma pintinn wɔ hydrochloric acid mu wɔ ɔhyew a ennu digrii 80 mu . Sɛ wɔde toto nickel-chromium alloys (sɛ nhwɛso no, Inconel 600) a ɛtwe adwene si oxidation resistance so a, ne molybdenum a ɛdɔɔso (26%-30%) no yɛ passive layer a ɛyɛ den, a ɛko tia hydrogen ion erosion yiye na edi asɛm a ɛfa passive film degradation wɔ reductive acids a nea etwa to no hyia no ho dwuma.
Hastelloy B nso di mu wɔ mmeae a ɛtew nneɛma so a chloride ion dodow dɔɔso wom. Ɛko tia pitting, crevice corrosion, ne stress cracking. Sɛ wɔde toto titanium aduru a ɛyɛ mmerɛw sɛ hydrogen a ɛyɛ mmerɛw wɔ hydrochloric acid a ɛtew so mu, anaa Monel afrafrade a enni ɔhyew a ɛdɔɔso a ɛko tia nsɛe wɔ hydrochloric acid a ɛwɔ ɔhyew a ɛkorɔn, -aduru a ɛkɔ soro mu ho a, Hastelloy B ma bere tenten -gyinabea a ɛkorɔn. Wɔ ɔhyew a ɛkorɔn (200-300℃) reductive acids anaa sulfur-a ɛwɔ media-te sɛ tebea a emu yɛ den a petroleum hydrodesulfurization units-wɔ mu mpo mu no, ɛkura mfiridwuma mu su a ɛkyɛn so ne nsɛe a ɛko tia, na ɛyɛ adwuma sen nea ɛko tia nsɛe-a ɛyɛ daa dade ne ebinom nikel-chromium-dade a wɔde afrafra.
Mfaso a ɛda nsow a ɛwɔ so sen Hastelloy ahorow afoforo no yɛ nea ɛda nsow: wɔ hydrochloric acid a ɛtew so a ɛho tew mu no, ɛda nsɛe a ɛko tia yiye adi sen Hastelloy C series (a ɛkyɛn so wɔ nsɛm a wɔadi afra mu) a ɛho ka sua; wɔ hydrochloric acid a ɛdɔɔso-mu no, ne nsɛe a ɛko tia no boro Hastelloy G series a ɛtwe adwene si sulphuric acid a ɛko tia so no so.
Efi aduruyɛdan ahorow so kosi mfiridwuma mmeae so no, Hastelloy B, a ne mfaso a wɔde asi n’ani so a ɛko tia nsɛe-repue sɛ "akwanside a ɛbɔ ho ban" a ɛho nhia wɔ mmeae a ɛtew nsɛe so.
