Ntawm Qhov Kev Sib Txuas Tshwj Xeeb ntawm Sulfuric Acid Concentration thiab Kub Puas Yog 1.2 millimeter 316 Stainless Hlau Sheath Yuav Tsum Tau Hloov Txhua Rau Rau Lub Hlis hauv Electroplating Bath Heater Service?

Sulfuric acid yog ib qho tseem ceeb ntawm tooj liab, nickel thiab chromium plating daws. Cov txheej txheem engineers yog lub luag hauj lwm rau hluav taws xob immersion heaters hauv electroplating da dej. Feem ntau cov concentrations yog 5 mus rau 15 feem pua ​​​​sulfuric acid, ntawm kev khiav hauj lwm kub ntawm 40 mus rau 60℃C. Vim hais tias ntawm qhov chaw txwv nyob rau hauv lub plating tso tsheb hlau luam thiab yuav tsum muaj ib tug ceev thermal teb, ib tug 1.2 hli 316 stainless hlau sheath feem ntau yog siv. Txawm li cas los xij, kev txhim kho dav dav tuaj yeem ua rau lub neej luv luv mus rau rau lub hlis lossis tsawg dua nyob rau hauv qee qhov kev sib txuas ntawm cov kua qaub thiab qhov siab ntawm qhov kub ntawm qhov kub ntawm watt ntom. Daim ntawv no muab cov kev txwv tseeb uas 1.2 hli 316 sheath yuav tsum tau hloov ib nrab-ib xyoos ib zaug rau cov kev pabcuam electroplating da dej rhaub.

Corrosion Cwj Pwm ntawm 316 hauv Dilute Sulfuric Acid ntawm High Deg Kub
Hauv cov ntsiab lus ntawm sulfuric acid qis dua 15% ntawm qhov kub qis dua 50 degree, 316 stainless hlau yog passive thiab corrodes ntawm tus nqi qis dua 0.1 hli hauv ib xyoos. Txawm li cas los xij, cov yeeb yaj kiab passive tsis ruaj khov ntawm qhov kub siab dua. Tus nqi corrosion nyob rau hauv 10% sulfuric acid nce mus rau 0.2-0.4 hli / xyoo ntawm 60 degree. Ntawm 70℃nws nce mus rau 0.5-1.0 mm / xyoo. Ntawm 80 degree, tus nqi yog> 2 hli / xyoo. Rau ib lub 1.2 hli sheath, qhov tsawg kawg nkaus tus qauv thickness rau siab ntim yog hais txog 0.6 hli. Tom qab 6 lub hlis, nrog tus nqi corrosion ntawm 1.2 hli hauv ib xyoos, kev nkag mus rau corrosion ntawm 0.6 hli (1.2 hli mus rau 0.6 hli) tshwm sim. Lub rau -hli hloov qhov pib sib haum mus rau kev sib xyaw ntawm cov kua qaub thiab cov ntaub qhwv qhov kub thiab txias uas tsim kom muaj corrosion ntawm qhov kev txiav txim ntawm 1.0 mus rau 1.5 hli hauv ib xyoos.

Qhov tseem ceeb tshaj plaws rau 6 Lub Hlis Kev Pabcuam Lub Neej
Cov nram qab no ua ke ntawm acid concentration thiab sheath nto kub raws li nyob rau hauv immersion kuaj ntawm 316 cov qauv nyob rau hauv sulfuric acid daws nyob rau hauv electroplating kev pab cuam qhov kub thiab txias ua rau ib tug 6-hli siab tshaj kev pab cuam lub neej rau ib tug 1.2 hli phab ntsa.

Sulfuric Acid Concentration (Weight %) Bulk Bath Temperature Sheath Surface Temperature at 8 W/cm2 (18℃rise) Cia siab tias Corrosion Rate at Surface Temperature Time to Reduce 1.2 mm to 0.6 mm Service Life to Replacement 5% 40℃58℃0.15 – 0.30 mm. 50℃68℃0.40 - 0.70 mm / xyoo 0.9 - 1.5 xyoo 1 - 2 xyoo 5% 55℃73℃0.70 - 1.20 mm / xyoo 0.5 - 0.9 xyoo 0.6 - 1 xyoo 8% 40℃58℃0.20 mm / xyoo 4 xyoos 8% 45℃63℃0.40 - 0.70 mm / xyoo 0.9 - 1.5 xyoo 1 - 2 xyoos 8% 50℃68℃0.70 - 1.20 mm / xyoo 0.5 - 0.9 xyoo 0.6 - 1 xyoo 10% 3501.45℃/ xyoo 3 xyoos 2-4 xyoos
10% 40℃58℃0.40 - 0.70 hli / xyoo 0.9 - 1.5 xyoo 1 - 2 xyoo
10% 45℃63℃0.70 - 1.20 mm / xyoo 0.5 - 0.9 xyoo 0.6 - 1 xyoo 12% 35℃53℃0.30 - 0.50 mm / xyoo 1.2 - 2 xyoo 1.5 - 2.5 xyoo 12% 40 degree. 0.6 - 1.0 xyoo 0.8 - 1.2 xyoo 12% 45℃63℃1.00 - 1.80 mm / xyoo 0.3 - 0.6 xyoo 0.4 - 0.7 xyoo 15% 30℃48℃0.30 - 0.50 mm / xyoo 1.215 - 2 xyoos
15% 35℃53℃0.60 - 1.00 mm / xyoo 0.6 - 1.0 xyoo 0.8 - 1.2 xyoo
15% 40℃58℃1.20 - 2.00 hli / xyoo 0.3 - 0.5 xyoo 0.4 - 0.6 xyoo
Lub sheath nto rau 10% sulfuric acid electroplating da dej ntawm 45℃tej kub thiab 1.2 hli sheath ntawm 8 W / cm² yog hais txog 63 degree. Qhov kev cia siab corrosion yog 0.7–1.2 mm / xyoo, txo qis phab ntsa 1.2 mm rau 0.6 mm hauv 0.5–0.9 xyoo. 6 hli hloov yog tsim nyog. Txo qhov kub thiab txias mus rau 40oC txo qhov kub ntawm qhov chaw mus rau 58oC txo qhov corrosion mus rau 0.4-0.7 hli hauv ib xyoos thiab lub neej rau 1-2 xyoos.

Lub hnab ntawv ua haujlwm nyab xeeb rau -Lub Hlis Hloov Kho
Cov lus hauv qab no qhia tau hais tias qhov kev nyab xeeb siab tshaj plaws ntawm sulfuric acid kub ntawm ntau yam watt ntom ntom rau 1.2 hli 316 sheath kom muab lub neej ua haujlwm tsawg kawg ntawm rau lub hlis ua ntej phab ntsa degradation rau 0.6 hli xav tau hloov.

Watt Density (Temperature Rise) Maximum Bulk Temperature for 5% H₂SO₄ Maximum Bulk Temperature for 8% H₂SO₄ Maximum Bulk Temperature for 10% H₂SO₄ Maximum Bulk Temperature for 12% H₂SO₂5% H₂SO₄ Qhov siab tshaj plaws 4 W / cm² (10℃sawv) 63℃58℃53℃50℃45℃6 W / cm² (14℃sawv) 59℃54℃49℃46℃41℃8 W / cm² (18℃sawv) 55℃50℃45℃45℃42℃W 3. 46℃41℃38℃33℃12 W / cm² (26℃nce) 47℃42℃37℃34℃29 degree
10% sulfuric acid Tej kub 45℃8 W / cm 2 18℃nce 63℃nto Safe bulk txwv 45℃-marginal rau txheem electroplating da dej. Txo watt ntom ntom rau 6 W / cm^2 (14℃nce, nto 59 degree) ua rau muaj kev nyab xeeb ntau ntawm 49 degree, yog li 45℃yog qhov zoo rau rau -hli hloov.

Tsim Kev Hloov Kho Kom Txhim Kho Lub Neej Tshaj Li Rau Rau Lub Hlis
Yog tias cov txheej txheem electroplating xav tau 1.2 hli 316 sheath thiab lub neej rau lub hli tsis txaus, peb tuaj yeem hloov kho kom ntev lub neej kev pabcuam. Thawj qhov yog siv lub tshuab ua kom ntev dua kom txo qis watt ceev. Txo los ntawm 8 W / cm² mus rau 4 W / cm² txo qhov kub thiab txias ntawm 18℃mus rau 10 degree, nqis los ntawm kev tswj hwm 6 hli mus rau 1-2 xyoo kev tswj hwm. Qhov kev hloov kho thib ob yog txhawm rau txhawb kev ncig ntawm cov kua qaub hla lub tshuab cua sov. Cov dej ntws tawm yuav txwv qhov kub ntawm qhov kub ntawm 40 mus rau 60 feem pua, ua kom lub plhaub txias dua. Qhov kev txhim kho thib peb yog los qhia txog kev txhim kho corrosion inhibitor Commercial inhibitors rau sulfuric acid tuaj yeem txo qis corrosion ntawm 50 mus rau 80 feem pua. Rau plating da dej siv 12-15% sulfuric acid ntawm 45-50 degree, engineers yuav tsum tau hloov mus rau ib tug ntau dua alloy xws li Alloy 20 los yog Alloy 825. Cov ntaub ntawv no qhia passive cwj pwm nyob rau hauv dilute sulfuric acid mus txog 80 degree, yog li ntawd nce lub neej kev pab cuam mus rau 5-10 xyoo. Nco ntsoov lub xeev cov kua qaub concentration, qhov kub thiab txias yuav tsum tau hloov lub sij hawm thaum qhia cov cua sov rau cov kev pab cuam electroplating. Ib tus neeg tsim khoom hais txog 316 rau 15% sulfuric acid ntawm 50℃yam tsis tau muab kwv yees lub neej rau cov khoom siv tsis ua lub luag haujlwm. Kev ua haujlwm ntawm cov kua qaub concentration, qhov kub thiab watt ntom ntom tso cai rau kev ntseeg tau ntawm cov cua sov lub neej thiab kev npaj kev saib xyuas hauv cov txheej txheem electroplating. Lub rau hli hloov qhov pib rau 1.2 hli 316 sheath yog