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Akụkọ

usoro
Workpiece → degreasing → mmiri ịsacha → pickling → mmiri ịsacha → imikpu na enyemaka plating ihe mgbaze → ihicha na preheating → ọkụ-mikpu galvanizing → imecha → jụrụ oyi → passivation → rinsing → ihicha → nnyocha
(1) Na-eweda ya ala
Enwere ike iji ihe na-emebi emebi kemịkalụ ma ọ bụ ihe na-eme ka mmiri na-ehicha ihe na-eme ka ọ dị ọcha ruo mgbe a na-eji mmiri wetted workpiece kpamkpam.
(2) Ịkụkọ
Enwere ike ime ya na H2SO4 15%, thiourea 0.1%, 40 ~ 60 ℃ ma ọ bụ HCl 20%, hexamethylenetetramine 1 ~ 3g/L, 20 ~ 40℃. Mgbakwunye nke corrosion inhibitor nwere ike igbochi matriks ka ọ ghara imebi ya ma belata mmịpụta hydrogen nke ígwè matrix. Ngwọta na-adịghị mma na ọgwụgwọ pickling ga-eme ka adhesion na-adịghị mma nke mkpuchi ahụ, enweghị mkpuchi zinc ma ọ bụ peeling nke oyi akwa zinc.
(3) Mmụgharị imikpu
A makwaara dị ka onye na-ahụ maka njikọta, ọ nwere ike ime ka mpempe ọrụ ahụ na-arụ ọrụ tupu ikpu mmiri iji kwalite njikọ dị n'etiti oyi akwa na mkpụrụ. NH4Cl 15% ~ 25%, ZnCl2 2.5%~3.5%, 55~65℃, 5 ~ 10min. Iji belata ngbanwe nke NH4Cl, enwere ike ịgbakwunye glycerin nke ọma.
(4) ihicha na ikpo ọkụ
Iji gbochie workpiece si deforming n'ihi na nkọ ịrị elu nke okpomọkụ n'oge immersion plating, na wepụ ihe fọdụrụ mmiri mmiri, iji gbochie zinc mgbawa, na-akpata zinc mmiri mmiri mgbawa, preheating bụ n'ozuzu 120-180 Celsius C.
(5) galvanizing na-ekpo ọkụ
Ọ dị mkpa ijikwa ọnọdụ okpomọkụ nke ngwọta zinc, oge ntinye na ngwa ngwa nke a na-ewepụ workpiece na ngwọta zinc. Okpomọkụ dị oke ala, mmiri mmiri nke mmiri mmiri zinc adịghị mma, mkpuchi ahụ dị oke na enweghị isi, ọ dị mfe ịmepụta sagging, na ọdịdị ọdịdị adịghị mma; okpomọkụ dị elu, mmiri mmiri nke zinc mmiri mmiri dị mma, mmiri mmiri zinc dị mfe ikewapụ na workpiece, na ihe omume nke sagging na wrinkles na-ebelata. Ihe mkpuchi siri ike, nke dị mkpa, ọdịdị dị mma, nrụpụta mmepụta dị elu; Otú ọ dị, ọ bụrụ na okpomọkụ dị oke elu, a ga-emebi ihe na-arụ ọrụ na ite zinc nke ukwuu, a ga-emepụta nnukwu mmiri ozuzo nke zinc, nke ga-emetụta àgwà nke akwa akwa zinc ma rie nnukwu zinc. N'otu okpomọkụ ahụ, oge ntinye nke imikpu na-adị ogologo ma akwa akwa akwa akwa. Mgbe achọrọ otu ọkpụrụkpụ ahụ na okpomọkụ dị iche iche, ọ na-ewe ogologo oge maka ịkwanye mmiri mmiri dị elu. Iji gbochie nrụrụ okpomọkụ dị elu nke workpiece ma belata dross zinc kpatara ọnwụ ígwè, onye nrụpụta izugbe na-anabata 450 ~ 470 ℃, 0.5 ~ 1.5min. Ụfọdụ ụlọ mmepụta ihe na-eji okpomọkụ dị elu maka nnukwu workpieces na nkedo ígwè, ma na-ezere ọnọdụ okpomọkụ nke nnukwu mfu ígwè. Iji mee ka mmiri na-ekpo ọkụ na-ekpo ọkụ na-ekpo ọkụ na-ekpo ọkụ na-ekpo ọkụ na okpomọkụ dị ala, gbochie mkpuchi ahụ ka ọ ghara ịdị oke, ma melite ọdịdị nke mkpuchi ahụ, a na-agbakwunye 0.01% na 0.02% nke aluminom dị ọcha. Ekwesịrị ịgbakwunye aluminom na obere ego ọtụtụ oge.
(6) imecha
Emecha workpiece mgbe plating bụ tumadi iwepu n'elu zinc na zinc nodules, ma site n'ikwe ma ọ bụ ntuziaka ụzọ.
(7) Passivation
Ebumnuche bụ iji melite nguzogide ikuku corrosion n'elu nke workpiece, belata ma ọ bụ ịgbatị ọdịdị nke nchara ọcha, ma nọgide na-enwe ọdịdị dị mma nke mkpuchi. Ha niile nwere chromate, dị ka Na2Cr2O7 80 ~ 100g/L, sulfuric acid 3 ~ 4ml/L.
(8) Ịjụ oyi
A na-eme ka mmiri dị jụụ n'ozuzu ya, mana okpomọkụ ekwesịghị ịdị oke ala iji gbochie ihe a na-arụ ọrụ, karịsịa nkedo, site na mgbawa na matriks n'ihi oyi na mbelata.
(9) Nyocha
Ọdịdị nke mkpuchi ahụ na-egbuke egbuke, zuru ezu, na-enweghị sagging ma ọ bụ wrinkles. Nyocha nke ịdị arọ nwere ike iji ihe mkpuchi mkpuchi mkpuchi, usoro a dị mfe. Enwere ike nweta ọkpụrụkpụ nke mkpuchi ahụ site n'ịgbanwe ọnụọgụ zinc adhesion. Enwere ike ịgbatị ike nkekọ site na ịpị na-ehulata, na ihe nlele kwesịrị ịgbatị na 90-180 Celsius, ọ dịghịkwa ihe mgbawa ma ọ bụ peeling nke mkpuchi. Enwere ike ịnwale ya site na iji hama dị arọ kụrie ya.
2. Usoro nhazi oyi akwa na-ekpo ọkụ na-ekpo ọkụ na-ekpo ọkụ na-ekpo ọkụ galvanized oyi akwa bụ usoro nke ịmepụta ígwè-zinc alloy n'etiti ígwè matrix na elu zinc oyi akwa. A na-emepụta oyi akwa ígwè-zinc alloy n'elu ọrụ ahụ n'oge galvanizing na-ekpo ọkụ. The ígwè na dị ọcha zinc oyi akwa jikọtara nke ọma, na usoro nwere ike nanị kọwara dị ka: mgbe ígwè workpiece na-mikpu n'ime a wụrụ awụ zinc, a siri ike ngwọta nke zinc na alfa ígwè (ahụ isi) na mbụ kpụrụ na interface. Nke a bụ kristal kpụrụ site na igbari atọm zinc n'ime igwe igwe isi na steeti siri ike. Atọm ọla abụọ a jikọtara ọnụ, na mmasị dị n'etiti atọm ahụ pere mpe. Ya mere, mgbe zinc ruru saturation na ngwọta siri ike, atom abụọ nke zinc na ígwè na-agbasa ibe ha, na zinc atom ndị gbasasịrị (ma ọ bụ tinye) n'ime ígwè matrix na-akwaga na matrix lattice, ma jiri nwayọọ nwayọọ na-etolite alloy na. ígwè, na mgbasa Iron na zinc dị n'ime zinc a wụrụ awụ na-etolite ogige intermetallic FeZn13, nke na-abanye n'ime ala nke ite galvanizing na-ekpo ọkụ, nke a na-akpọ zinc dross. Mgbe ewepụrụ workpiece na zinc immersion ngwọta, a na-emepụta akwa zinc dị ọcha n'elu, nke bụ kristal hexagonal. Ọdịnaya nke ígwè ya abụghị ihe karịrị 0.003%.
Nke atọ, ọrụ nchebe nke oyi akwa galvanized na-ekpo ọkụ na-ekpo ọkụ na-ekpo ọkụ nke oyi akwa electro-galvanized na-abụkarị 5-15μm, na-ekpo ọkụ na-ekpo ọkụ galvanized oyi akwa na-adịkarị n'elu 65μm, ọbụna dị ka 100μm. Galvanizing na-ekpo ọkụ na-ekpo ọkụ nwere mkpuchi dị mma, mkpuchi dị oke na enweghị ntinye nke organic. Dị ka anyị niile maara, mgbochi ikuku corrosion usoro nke zinc na-agụnye n'ibu nchebe na electrochemical nchebe. N'okpuru ọnọdụ corrosion ikuku, enwere ihe nkiri nchebe nke ZnO, Zn (OH) 2 na zinc carbonate bụ isi n'elu akwa akwa zinc, nke nwere ike belata corrosion nke zinc ruo n'ókè ụfọdụ. Ihe nkiri nchebe (nke a makwaara dị ka nchara ọcha) mebiri emebi ma mepụta ihe nkiri ọhụrụ. Mgbe oyi akwa zinc mebiri nke ukwuu na matriks ígwè nọ n'ihe ize ndụ, zinc ga-emepụta nchebe electrochemical maka matrix. Ụdị ikike nke zinc bụ -0.76V, na ikike nke ígwè bụ -0.44V. Mgbe zinc na ígwè na-etolite microbattery, zinc na-agbaze dị ka anode. A na-echekwa ya dị ka cathode. N'ụzọ doro anya, na-ekpo ọkụ-mikpu galvanizing nwere mma ikuku corrosion iguzogide ígwè base karịa electro-galvanizing.
Nke anọ, njikwa nhazi nke zinc ash na zinc slag n'oge galvanizing na-ekpo ọkụ
Zinc ash na zinc dross ọ bụghị naanị na-emetụta ịdịmma nke akwa imi mmiri zinc, kamakwa na-eme ka mkpuchi ahụ sie ike ma na-emepụta nodules zinc. Ọzọkwa, ọnụ ahịa galvanizing na-ekpo ọkụ na-abawanye nke ukwuu. Na-emekarị, zinc oriri bụ 80-120kg kwa 1 ton workpiece. Ọ bụrụ na zinc ash na afuru efu dị njọ, oriri zinc ga-adị elu dị ka 140-200kg. Ịchịkwa carbon carbon bụ tumadi iji chịkwaa okpomọkụ wee belata nsị nke oxidation nke mmiri mmiri zinc na-emepụta. Ụfọdụ ndị na-emepụta ụlọ na-eji ájá refractory, unyi unyi, wdg mba ọzọ na-eji seramiiki ma ọ bụ bọọlụ iko nwere obere ikuku thermal, ebe mgbaze dị elu, ike ndọda dị ala, na enweghị mmeghachi omume na mmiri mmiri zinc, nke nwere ike belata ọnwụ okpomọkụ ma gbochie oxidation. Ụdị bọọlụ a na-adị mfe ka ihe na-arụ ọrụ na-akwapụ ya, ọ naghịkwa arapara n'ahụ. Mmetụta. N'ihi na nguzobe nke zinc dross na zinc mmiri mmiri, ọ bụ tumadi a zinc-ígwè alloy na oké ogbenye fluidity a kpụrụ mgbe ígwè ọdịnaya etisasịwo na zinc mmiri mmiri karịrị solubility na a okpomọkụ. Ọdịnaya zinc dị na afuru efu zinc nwere ike ịdị elu ruo 95%, nke na-ekpo ọkụ na-ekpo ọkụ. Isi ihe na-akwụ ụgwọ dị elu nke zinc. Enwere ike ịhụ ya site na nkwụsị nke solubility nke ígwè na mmiri mmiri zinc na ọnụ ọgụgụ nke ígwè gbazere, ya bụ, ọnụọgụ ígwè, dị iche na okpomọkụ dị iche iche na oge njide dị iche iche. N'ihe dị ka 500 Celsius C, mfu ígwè na-abawanye nke ọma site na ikpo ọkụ na ijide oge, ọ fọrọ nke nta ka ọ bụrụ na mmekọrịta dị n'ahịrị. N'okpuru ma ọ bụ n'elu nso nke 480 ~ 510 ℃, ígwè ọnwụ na-abawanye nwayọọ nwayọọ na oge. Ya mere, ndị mmadụ na-akpọ 480~510 ℃ mpaghara mgbasa ọjọọ. N'ime oke okpomọkụ a, mmiri mmiri zinc ga-emebi ihe arụ ọrụ yana ite zinc kacha njọ. Ọnwụ ígwè ga-abawanye nke ukwuu mgbe okpomọkụ dị n'elu 560 ℃, na zinc ga-emebi matriks ígwè mgbe okpomọkụ dị n'elu 660 ℃. . Ya mere, a na-eme plating ugbu a na mpaghara abụọ nke 450-480 ° C na 520-560 ° C.
5. Ịchịkwa ọnụ ọgụgụ nke dross zinc
Iji belata dross nke zinc, ọ dị mkpa iji belata ọdịnaya nke ígwè na ngwọta zinc, nke bụ ịmalite na ibelata ihe ndị na-agbaze ígwè:
⑴ Plating na okpomọkụ ichekwa kwesịrị izere ọnụ ọgụgụ kasị elu ebe nke ígwè mgbasa, ya bụ, adịghị arụ ọrụ na 480 ~ 510 ℃.
⑵ Dị ka o kwere mee, ihe ite zinc kwesịrị iji efere ígwè nwere carbon na ọdịnaya silicon dị ala welded. Ọdịnaya dị elu nke carbon ga-eme ka corrosion nke pan ígwè dị ngwa ngwa site na mmiri zinc, na ọdịnaya silicon dị elu nwekwara ike ịkwalite corrosion nke ígwè site na mmiri mmiri zinc. Ka ọ dị ugbu a, a na-ejikarị efere carbon ígwè dị elu 08F. Ọdịnaya carbon ya bụ 0.087% (0.05% ~ 0.11%), ọdịnaya silicon bụ ≤0.03%, o nwekwara ihe ndị dị ka nickel na chromium nke nwere ike igbochi ígwè ka ọ ghara imebi. Ejila ígwè carbon nkịtị, ma ọ bụghị ya, oriri zinc ga-adị ukwuu na ndụ nke ite zinc ga-adị mkpụmkpụ. A tụrụ aro ka iji silicon carbide mee tankị na-agbaze zinc, ọ bụ ezie na ọ nwere ike dozie mfu ígwè ahụ, mana usoro nhazi ahụ bụkwa nsogbu.
⑶Na-ewepu slag ugboro ugboro. A na-ebuli okpomọkụ ahụ na elu elu nke usoro okpomọkụ iji kewaa zinc slag na mmiri mmiri zinc, wee gbadaa n'okpuru usoro okpomọkụ, nke mere na zinc slag na-adaba na ala nke tank wee buru ya na ya. otu ngaji. Ekwesịrị ịzọpụta akụkụ ndị ahụ gbazere na-adaba na mmiri mmiri zinc n'oge.
⑷ Ọ dị mkpa iji gbochie ígwè dị na onye na-emepụta ihe na-ebubata ya na tankị zinc na workpiece. A ga-emepụta ngwakọta nke nwere ígwè na-acha ọbara ọbara-agba aja aja mgbe a na-eji ihe na-emepụta ihe eme ihe ruo oge ụfọdụ, a ga-ehichapụkwa ya mgbe niile. Ọ ka mma idowe uru pH nke onye na-etinye ihe n'ihe dịka 5.
⑸ Ihe na-erughị 0.01% aluminum na ngwọta plating ga-eme ka nhazi nke dross dịkwuo elu. Ọnụ ego aluminom kwesịrị ekwesị agaghị eme ka ọ dịkwuo mma nke ngwọta zinc ma mee ka ìhè nke mkpuchi dịkwuo mma, ma na-enyere aka belata nsị zinc na ájá zinc. Obere obere aluminom na-ese n'elu mmiri mmiri na-aba uru iji belata oxidation, na nke ukwuu na-emetụta àgwà mkpuchi ahụ, na-akpata ntụpọ ntụpọ.
⑹ Kpọọ ọkụ na ikpo ọkụ kwesịrị ịbụ otu iji gbochie mgbawa na ikpo ọkụ mpaghara.

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Oge nzipu: Sep-30-2021