Aluminium alloy casting: adwumayɛfo soro ayaresa ano aduru

Aluminium alloy soro ayaresa ne sɛ wɔbɛsesa su, nsɛsoɔ, nnuru a ɛwɔ mu ne microstructure a ɛwɔ aluminum alloy castings ani denam honam fam anaa nnuru akwan so na ama wɔanya soro tebea a ɛdi ahwehwɛdeɛ a ɛfa dwumadie ho. N’atirimpɔw ne sɛ ɛbɛma ahoɔden a ɛko tia nsɛe, nea ɛko tia ɔsɛe, asiesie a ɛwɔ castings mu, ama conductivity, weldability ne nneɛma afoforo atu mpɔn, na ama nneɛma a wɔde yɛ adwuma no atrɛw.

Anodizing ne sɛ wɔde aluminium aduru bɛhyɛ electrolyte a ɛne no hyia no mu, ayɛ no anode, na wɔayɛ oxide film a ɛyɛ den wɔ aluminium no ani denam electrolysis so. Saa oxide film yi wɔ ahoɔden pa a ɛko tia nsɛe na ebetumi asiw oxidation ne nsɛe a aluminum afrafra wɔ mmeae a emu yɛ den ano yiye. Bio nso, wobetumi asiesie oxide film no mu duru, ne den ne ne kɔla denam electrolyte a ɛwɔ mu ne sɛnea wɔyɛ no ho nhyehyɛe a wɔbɛhwɛ so no so. Sɛ nhwɛso no, anodized film a wonya wɔ sulphuric acid electrolyte mu no wɔ corrosion resistance a ɛkorɔn ne adsorption pa, na wobetumi de kɔla ahorow ayɛ no. Wɔde di dwuma kɛse wɔ adansi, kar, ofie mfiri ne nnwuma afoforo mu de ma nneɛma no hwɛbea ne ahobammɔ adwumayɛ tu mpɔn.

Nnuru a wɔdannan no ayaresa ne sɛ wɔbɛyɛ nnuru a wɔdannan no film wɔ aluminium a wɔde afrafra no ani. Nea ɛtaa ba ne chromate a wɔde sa yare ne phosphate a wɔde sa yare. Passivation film a wɔde chromate ayaresa ayɛ no wɔ corrosion resistance a ɛkyɛn so na ebetumi asiw nkitahodi a ɛda aluminium alloy ne corrosive medium ntam no ano yiye. Wɔtaa de yɛ castings a ɛho hia kɛse sɛ ɛko tia nsɛe. Phosphate ayaresa titiriw yɛ phosphate film wɔ castings no ani, a ɛnyɛ sɛ ebetumi ama castings no nsɛe a ɛko tia no atu mpɔn nko, na mmom ɛbɛma ne coating adwumayɛ nso atu mpɔn, sɛnea ɛbɛyɛ a nea edi hɔ a wɔde kata so ne casting no ani no bɛka abom denneennen, na adhesion ne ahobammɔ tumi a ɛwɔ coating no mu no ayɛ kɛse. Wɔde di dwuma kɛse wɔ ahunmu, akwantu ne nnwuma afoforo mu.

Electroplating yɛ sɛ wɔde dade anaa aduru bi bɛto aluminium aduru no ani denam nnyinasosɛm a ɛne sɛ wɔde anyinam ahoɔden yɛ adwuma so na ama wɔanya ɔfasu no so nneɛma a wɔpɛ. Wɔ aluminium aduru a wɔde afra mu no, ɛnam pretreatment ne electroplating akwan a ɛfata so no, wobetumi anya dade a wɔde kata so ahorow a wɔde gu fam, te sɛ zinc plating, nickel plating, chromium plating, ne nea ɛkeka ho Galvanizing betumi ama castings no ahoɔden a ɛko tia nsɛe no atu mpɔn na wɔde yɛ afã horow wɔ mmeae a ɛhɔ yɛ nwini nickel plating betumi ama ahoɔden a ɛko tia ɔhyew ne ɔhyew a ɛko tia yiye, na ɛfata ma afã horow a ɛhwehwɛ sɛ ɛyɛ den kɛse na ɛko tia ɔsɛe; chrome plating wɔ hardness ne glossiness a ɛkyɛn so, na wɔtaa de di dwuma ma nneɛma a ɛwɔ ahosiesie ahwehwɛde a ɛkorɔn, te sɛ kar ntwahonan, aguaree hardware, ne nea ɛkeka ho, sɛnea ɛbɛyɛ a ɛnyɛ sɛ ne soro no yɛ fɛ nko, na mmom ɛwɔ nkwa nna tenten nso.

Sandblasting yɛ mframa a ɛkɔ ntɛmntɛm a wɔde petepete abrasive particles gu aluminium alloy castings no ani, na yi efĩ a ɛwɔ soro, ngo a ɛyɛ nkekae, oxide scales, ne nea ɛkeka ho denam abrasives nkɛntɛnso so, bere a ɛyɛ mmerɛw kodu baabi wɔ casting no ani. Saa roughness yi betumi ama baabi a ɛda ade a wɔde kata so ne nea wɔde gu mu no ntam no ayɛ kɛse, ama ade a wɔde kata so no abata ho yiye, na ama wɔanya fapem pa ama ade a wɔde kata so akyiri yi anaasɛ wɔde bɛbɔ ho ban. Sɛ nhwɛso no, ansa na wɔbɛkata mfiridwuma afã horow bi so no, anhwea a wɔde bɛbɔ no betumi ama ade a wɔde kata so no a ɛbata ho no atu mpɔn yiye, sɛnea ɛbɛyɛ a afã horow a wɔayɛ ho adwini no betumi agyina wim tebea ano yiye na ɛbɔ ho ban, atrɛw wɔn nkwa nna mu, na nea wɔde agu no ani bere a wɔde anhwea abɔ akyi no de matte tumi a ɛyɛ pɛ ba, na ɛno nso betumi ama ade no hwɛbea atu mpɔn akodu baabi.

Bere a wɔawie atifi hɔ aduruyɛ akwan a ɛwɔ atifi hɔ no bi, te sɛ anodizing ne nnuru a wɔdannan no, wɔtaa yɛ aduru a wɔde yɛ aduru ne nea wɔde hyɛ mu de ma kɔla nkɛntɛnso ne ahobammɔ adwumayɛ a ɛwɔ casting no ani no yɛ kɛse bio. Dyeing betumi ama casting no ani ada kɔla ahorow a ɛhyerɛn te sɛ kɔkɔɔ, bruu, ahabammono, ne nea ɛkeka ho adi, sɛnea adetɔfo ahiade ne nneɛma a wɔyɛ no ho ahwehwɛde ahorow te. Nsɔano aduruyɛ ne sɛ wɔde casting a wɔayɛ ho adwuma no bɛhyɛ nsuo soronko bi a wɔde ahyɛ mu ma ahyɛ micropores a ɛwɔ soro no ma na wɔatoto mu na amma abɔnten so nneɛma a ɛporɔw no ankɔ mu, na wɔasiw dye no nso kwan sɛ ɛnyera mfiri micropores no mu, na ama kɔla no ayɛ den na akyɛ, na ama wɔahwɛ ahu sɛ casting no kɔ so yɛ fɛ na ɛyɛ adwuma wɔ bere tenten a wɔde di dwuma no mu.