Yuav Ua Li Cas Ib H₂O₂ Transfer Needle Chaw Tsim Tshuaj Siv Nto Engineering Los Tiv Thaiv Corrosion & Particulate Contamination

Ob leeg ID thiab OD ntawm lubH₂O₂ Transfer Needleyuav tsum tau tshwj xeeb nto huv si thiab corrosion kuj: sab nrauv hu H₂O₂ tee / vapor (yuav tsum tiv taus pitting); sab hauv conveys H₂O₂ (yuav tsum tsis txhob tso cov khoom los yog chaw nres nkoj crevices qhov twg crystals tsim / decompose). Electropolishing (EP) yog txheej txheem tshwj xeeb.

EP Txoj Cai & ASTM B912 Ua Raws Cai

Workpiece ua anode nyob rau hauv phosphoric-sulfuric electrolyte; micro-peaks dissolve preferentially (peak tam sim no ceev), smoothing nto thiab enriching chromium - raug tshem tawm 0.5–2.5 µm (tswj tsis pub dhau ± 0.0001″ / 2.5 µm chav kawm). ASTM B912 qhia meej txog cov tshuaj pleev, qhov ntsuas, thiab cov kev cai tom qab yaug. Cov tuam txhab ua raws li IQ / OQ / PQ: OQ txiav txim siab tam sim no qhov ntom ntom-kub-lub sij hawm lub qhov rais kom ncav cuag lub hom phiaj Ra (feem ntau <0.2 µm) thiab passive zaj duab xis thickness; PQ qhia txog kev rov ua dua tshiab dua li peb qhov sib law liag.

Particulate Control tseem ceeb

Vaporized H₂O₂ nrog entrained metallic hais yuav ua rau arcing nyob rau hauv lub plasma teb los yog deposit rau chamber sensor windows. EP tshem tawm cov micro-burrs, zom cov cim, thiab swage fold-lines, zoo heev txo qis hauv kev siv cov khoom tawg. Tom qab ntxuav ultrasonic, qhov kawg yaug dej yog dhau los ntawm 0.22-0.45 µm membrane; Particles yog hnyav / suav microscopically tawm tsam AQL txwv (xws li, Tsawg dua lossis sib npaug rau N particles / koob).

Passivation Synergy

Tam sim ntawd tom qab EP, citric acid passivation (nitric-dawb lossis qis-nitric kom ua raws li RoHS / REACH nyiam) txhawb kev loj hlob ntawm Cr₂O₃ txheej txheej. Fe²⁺ nyob rau hauv lub pas dej da dej yog saib xyuas kom tsis txhob muaj qhov saturation thiab tsis ua haujlwm. Kev sib xyaw ua ke "EP + Passivation" yog tus qauv rau H₂O₂ wetted qhov chaw.

Kev tshuaj xyuas & yam ntxwv

Surface roughness tester: Ra / Rz (raug Ra 0.10-0.20 µm)

Ferroxyl test / potassium ferricyanide qhov chaw kuaj rau kev tshem tawm hlau dawb

Cov tshuaj ntsev ntsev (ASTM B117), feem ntau 24-48 teev tsis muaj xeb liab

SEM / EDS chaw kuaj xyuas qhov nce saum npoo Cr / Fe piv lees paub qhov passivation

Nug rau daim ntawv tshaj tawm txog kev lees paub EP, cov ntaub ntawv tswj xyuas cov ntaub ntawv, thiab cov ntaub ntawv tshuaj tsuag ntsev -ib lub Hoobkas tsuas yog hais tias "peb polished nws" yam tsis muaj cov ntaub ntawv ua rau muaj kev pheej hmoo tsis tsim nyog.