Khoom Taw Qhia

Brass dej cua sov tuag thaiv dej iav peev casting qhov chaw

H70 Brass Khoom Lub Npe: H70 Brass (Hard Ntau dua lossis sib npaug ntawm 0.5mm) Qib: H70 C2600 Txuj: National Standard GB/T 5231-2001 Japanese Standard JIS H3100: 2006 American Standard ASTM B36/B36M Xyoo: 2008

Nyob rau hauv ib tug 10% H 2SO4 nruab nrab, lub corrosion muaj peev xwm E cor ntawm Ta txheej thiab TaC / Ta composite txheej yog -0.428V thiab -0.39V, feem, uas yog {{ 9}}.112V thiab 0.15 V siab dua C17200 substrate ({12}}.540V). Lub corrosion tam sim no ntom ntom I cor yog 1.17 × 10-6 A / cm2 thiab 2.64 × 10-7 A / cm2, raws li, uas tau txo los ntawm kwv yees li ob mus rau peb qhov kev txiav txim loj piv rau cov substrate (1.73 × { {24}} A/cm2), qhia txog qhov me me corrosion nyiam thiab tus nqi. Tus nqi electrode impedance ntawm Ta txheej thiab TaC / Ta composite txheej yog siab dua li ntawm cov substrate, uas ua rau cov nqi hloov pauv ntau dua, cov txheej txheem electrode qeeb, thiab txo tus nqi corrosion. Cov txheej txheej sab nrauv ntawm qhov corrosion ntawm C17200 substrate yog xoob, thiab cov ciam teb ua rau xeb. Cov khoom siv corrosion yog tooj liab oxide. Qhov saum npoo corrosion morphology ntawm Ta txheej thiab TaC / Ta composite txheej qhia me ntsis kev hloov pauv piv rau qhov tsis muaj qhov tsis zoo, tsis muaj cov khoom siv corrosion lossis pitting tshwm sim. Qhov saum npoo yog tuab Ta2O5 nyias zaj duab xis, uas tau txhim kho corrosion kuj piv rau substrate. H70 tooj dag muaj cov yas zoo heev thiab lub zog siab, kev ua haujlwm zoo, vuam yooj yim, thiab tsis tiv taus kev xeb, tab sis nws tuaj yeem tawg. Siv rau qhov sib sib zog nqus txias thiab sib sib zog nqus nqus qhov chaw, xws li radiator casings, conduits, corrugated kav, casings, thiab gaskets.

Hauv 20% H2SO4 nruab nrab, qhov corrosion muaj peev xwm E cor ntawm Ta txheej thiab TaC / Ta txheej yog -0.39 V thiab -0.40 V, raws li , uas tau hloov pauv zoo los ntawm 0.41 V thiab 0.42 V piv rau C17200 substrate. Lub corrosion tam sim no ntom ntom I cor yog 8.23 ​​× 10-5 A / cm2 thiab 7.62 × 10-5 A / cm2, raws li, uas tau txo los ntawm ib tug txiav txim ntawm magnitude piv rau lub substrate (2.5 × {{22). }} A/cm2). Ta coatings thiab TaC / Ta composite coatings nthuav tawm ntau dua impedance tshaj lub substrate, slowing down the electrochemical corrosion process. Qhov saum npoo corrosion ntawm C17200 substrate yog hnyav, nrog pom tseeb nag lossis daus ntawm corrosion khoom xws li tooj liab oxide. Muaj ib qho me me ntawm pitting corrosion ntawm Ta txheej thiab TaC / Ta txheej corrosion nto. Lub txheej txheej yog txheej ntawm Ta2O5 zaj duab xis los tiv thaiv sab hauv ntawm txheej los ntawm corrosion los ntawm H2SO4 tov. Cov tshuaj muaj pes tsawg leeg: tooj liab Cu: 68.5 ~ 71.5 Zinc Zn: Residual lead Pb: Tsawg dua lossis sib npaug rau 0.03 Nickel Ni: Tsawg dua lossis sib npaug rau 0.5 Hlau Fe: Tsawg dua lossis sib npaug rau 0.10 Beryllium Sb: Tsawg dua lossis sib npaug rau 0.002 Bismuth Bi: Tsawg dua los yog sib npaug rau 0.002 Lus Cim: Tsawg dua lossis sib npaug rau 0.3 ( impurity) Ta txheej thiab TaC / Ta cov txheej txheej muaj corrosion hnyav dua hauv 20% H 2SO4 nruab nrab dua li hauv 10% H 2SO4 nruab nrab, thiab qhov tshwm sim passivation yog pom tseeb dua. Cov zaj duab xis passivation yog thickened, thiab Ta txheej thiab TaC / Ta composite txheej tsis tev tawm raws li qhov concentration ntawm corrosive nruab nrab nce. Ib qho ruaj khov thiab tuab Ta2O5 nyias zaj duab xis yog tsim rau ntawm qhov chaw, txhim kho corrosion kuj ntawm beryllium tooj liab substrate.

Mechanical properties Tensile strength σ b (MPa): Ntau dua lossis sib npaug rau 390 Elongation tus nqi δ 10 (%): Ntau dua lossis sib npaug rau 12 Lus Cim: Tensile mechanical zog ntawm cov ntawv hlau Cov qauv loj: Thickness Ntau dua los yog sib 0,5

Peb yog cov chaw tsim khoom ntawm tooj dag kav dej tuag-kawg poob ciab peev castings, yog tias koj xav tau cov ntaub ntawv ntxiv thov hu rau peb!

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