Sɛ ɛho hia sɛ wɔn a wɔyɛ nneɛma no ma nsu nhama a ɛwɔ nsu mu no yɛ papa a, ɛnde intergranular corrosion yɛ ɔhaw a ɛsɛ sɛ wodi so wɔ nsu afiri a wɔyɛ no mu.
Yɛde ahwɛyiye behu corrosion ɔsɛe a aniwa nhu a wɔfrɛ no intergranular corrosion (IGC) de ate sɛnea intergranular corrosion ba ne sɛnea wobehu na wɔabrɛ ɔsɛe ase.
Dɛn ne intergranular corrosion no mu .
Wɔ nneɛma ho nyansahu mu no, intergranular corrosion (IGC), a wɔsan frɛ no intergranular attack (IGA) no yɛ corrosion bi a nneɛma no ahye ahye yɛ nea ɛyɛ mmerɛw sɛ ɛbɛsɛe sen wɔn mu. Intergranular corrosion (a wɔsan frɛ no weld decay) nya dade a ɛnyɛ den so nkɛntɛnso wɔ structure level na ebia ɛrenkyerɛ sɛnkyerɛnne a ɛda adi sɛ asɛe kosi sɛ nsɛe no bɛkɔ so kɛse.
Dɛn nti na intergranular corrosion ba mu
Ne tiaatwa mu no, intergranular corrosion fi welding a ɛwɔ pipes, ɔhyew a wɔmfa nyɛ adwuma yiye, ne exposure a ɛwɔ 425 ne 870 degrees Celsius ntam.
Sɛ dadeɛ a ɛwɔ saa range yi mu no yɛ hyew a, ɛsesa wɔ structure level. Chromium a ɛwɔ aduru no mu no ne carbon yɛ adwuma ma ɛyɛ chromium carbide a ɛbɛn aburow hye no. Saa carbide a ɛba yi titiriw dannan ɔhye no ma ɛyɛ anode nkwammoaa. Crystal particles a ɛwɔ cathode nkwammoaa no mu, na corrosion fi ase.
Akwan a wɔfa so brɛ intergranular corrosion no ase, .
Mpɛn pii no, ɔhyew a wɔde sa yare no betumi adi ɔhaw no ho dwuma, na ɛde dade nhyehyɛe no asan aba baabi a ɛbɛn mfitiase tebea no.
Annealing anaa quenching yɛ ɔkwan a etu mpɔn a wɔfa so dan corrosion damage a ɛwɔ austenitic stainless steel mu no akyi.
Saa adeyɛ yi maa dade no yɛɛ hyew koduu 1060°C kosi 1120°C. Sɛ ɛyɛ hyew wie a, wɔma dade a ɛnyɛ den no yɛ hyew, na ɛma ɛyɛ nwini ntɛmntɛm ma ɛyɛ den ma aburow no ne ne nhyehyɛe no yɛ den. Wɔtaa de saa annealing yi di dwuma wɔ mfiridwuma mu welded paipu a ɛwɔ gyinapɛn a ɛkorɔn mu.
Enti ɛyɛɛ dɛn na yeduu hɔ?
On-line fixing & fusing (anealing) nnwinnade betumi ayɛ hyew stainless dade welded pipeto 1050°C afei cool no ɔhyew a ɛba fam sen 100 °C wɔ ahobammɔ ase hydrogen.The heating power supply of the intermediate ferquency induction is newest Dsp+Igbt structur. Energy-saving ne low-waste features.The titiriw developed inducer a wɔayɛ no sɛnea nneɛma a ɛwɔ stainless steel no te no betumi akora 15%-20% ahoɔden so a ɛne nneɛma afoforo a ɛwɔ adesuakuw koro no ara mu no bɔ abira.Using hydrongen as of gas minute every minute.
Sɛ wopɛ sɛ wusua pii a, Pleasr Klik ha: Electricity-powered stainless steel tubing fononoo a ɛyɛ hyew a ɛma ahoɔden .
