Wɔde spiral heat exchangers di dwuma kɛse wɔ nnuru, nnuruyɛ, aduan a wɔyɛ, ne ahoɔden mu esiane sɛnea ɛyɛ ketewaa ne ɔhyew a ɛkɔ baabiara a etu mpɔn nti. Wɔn adwumayɛ titiriw ne wɔn som nkwa nna no gyina nneɛma a wɔpaw so kɛse. Adwumayɛ tebea ahorow hwehwɛ sɛ wɔde nneɛma a wɔayɛ no sɛnea ɛfata di dwuma de hwɛ hu sɛ ɛbɛko atia nsɛe, ahoɔden, ne ɛka-a ɛyɛ yiye.
Carbon steel ne low-alloy steel ne fapem nneɛma a wɔde yɛ spiral heat exchangers, a ɛfata ma nsɛm a ɛnyɛ{1}}nsɛe anaasɛ ɛyɛ mmerɛw kakra (te sɛ nsu-kɔ-nsuo mu ɔhyew nsakraeɛ). Saa nneɛma yi ma ɛho ka sua na ahoɔden a ɛwɔ mfiri mu no yɛ kɛse, nanso ɛhia sɛ wɔyɛ nneɛma a ɛwɔ soro (te sɛ galvanizing anaa coating) na ama wɔn nkwa nna akyɛ. Wɔ ɔhyew a ɛkorɔn-nhyɛso kɛse-nhyɛso mu no, dade a wɔde afrafra a ɛba fam (te sɛ Q345R) betumi ama creep ne oxidation resistance atu mpɔn esiane nneɛma te sɛ molybdenum ne chromium a wɔde aka ho nti.
Dade a ɛnyɛ den (te sɛ 304 ne 316L) ne nea wɔpaw titiriw ma dade a ɛnyɛ den a ɛyɛ spiral heat exchangers, a ɛfata titiriw ma nsɛm ho amanneɛbɔ a chloride ions, acid ne bases wom, anaasɛ ahotew tebea horow. 316L, esiane molybdenum a ɛwɔ mu nti, ɛma ɛko tia pitting ne crevice corrosion a ɛkorɔn na wɔtaa de di dwuma wɔ nnuruyɛ ne nnwuma mu. Duplex stainless steels (te sɛ 2205) ka ahoɔden a ɛkorɔn ne chloride stress corrosion a ɛko tia bom, na ɛma ɛfata ma nsuo a ɛyɛ hyew a ɛkorɔn-a chloride ions wom.
Wɔayɛ afrafrade a egyina Nickel- so (te sɛ Hastelloy C276 ne Inconel 625) sɛ wɔmfa nni dwuma wɔ mmeae a ɛyɛ hyew kɛse, te sɛ acid a ɛyɛ den (sulfuric acid ne hydrochloric acid), hydrogen a ɛyɛ hyew kɛse ne nhyɛso kɛse-nhyɛso, anaasɛ nhyehyɛe a wɔde yi nkyene fi mu. Bere a ne bo yɛ den no, saa nneɛma yi gyina intergranular corrosion ne high-temperature oxidation ano na wɔtaa de di dwuma wɔ high-end applications te sɛ petrochemicals ne nneɛma a atwa yɛn ho ahyia ho banbɔ mu.
Titanium yɛ ade a eye ma po mu nsu a wɔde sesa ɔhyew. Esiane sɛ ɛyɛ nea ɛko tia chloride ion nsɛe yiye na ɛyɛ hare nti, wɔde di dwuma kɛse wɔ nneɛma te sɛ po so ahyɛn ne mpoano anyinam ahoɔden adwumayɛbea ahorow mu. Bio nso, nneɛma a ɛnyɛ -dadeɛ te sɛ graphite ne ceramics, ɛwom sɛ ɛtumi gyina nsɛeɛ- ano kɛseɛ deɛ, nanso ɛyɛ brittle ma enti ɛyɛ nnwuma nketewa-a ɛyɛ adwuma titire nko ara.
Nneɛma a wɔpaw no hwehwɛ sɛ wosusuw mfinimfini su, ɔhyew, nhyɛso, ne ɛka ho yiye. Ɛsɛ sɛ wɔn a wɔyɛ spiral heat exchangers no kari pɛ wɔ adwumayɛ ne sikasɛm mu denam corrosion testing ne engineering osuahu so na ama wɔahwɛ ahu sɛ mfiri no bɛyɛ adwuma bere tenten na ɛyɛ pintinn.
