Finishing of inside and outside of stainless steel canal and anti-corrosive rela
From;    Author:Stand originally
Surface of inside and outside of stainless steel canal (special if electroanalysis after polishing, mechanical polish) have good passivation layer, anti-corrosive capability is stronger. Surface of inside and outside is bright and clean degree tall, medium conglutinate is helpful for rarely anti-corrosive. The surface inside the canal is bright and clean spend tall liquid medium to stop less, be helpful for rinsing, special in pharmacy industry.

1, the surface inside the canal electroanalysises polishing (electrochemistry polish) : Electroanalysis the surface inside the canal is in polishing fluid stainless steel on positive pole, polishing fluid is in and inside flow is connected undertake polishing is handled with low voltage big electric current electroanalysising. At this moment the process that the surface inside the canal is having two contradict each other at the same time, namely layer of metallic surface passivation (contain stiff sex mucous membrane) generate with deliquescent. Because microcosmic raised part mixes the surface sunken the condition that enters passivation into film into the part is different, dissolve as a result of positive pole again. Because the surface is microcosmic raised part and sunken the condition that enters passivation into film into the part is different, dissolve as a result of positive pole again, chroma of salt of zincous area metal increases ceaselessly, the stiff sex mucous membrane of a kind of tall resistor is formed in the surface. This film differs in ply of concave and convex place bring about zincous surface current density big, point discharge is deliquescent rate is rapid, achieve inside short time cut the end that averages outstanding microcosmic share, can achieve very tall bright and clean spend Ra≤0.2-0.4μm. Fall in this kind of action, the watch inside the canal added content, those who added layer of metallic surface passivation is anti-corrosive ability.

The quality that how masters polishing wants with state of electrolyte recipe, chroma, temperature, weld time, current density, electrode, canal finishing degree about. Technical control is bad to can destroy a canal instead the surface is bright and clean degree, electroanalysis degree crosses the roughness with congress occurrence bigger more, even the canal discards as useless, make good quality need certain technology truly, cost cost is higher.

2, polish of machinery of the surface inside the canal: Have rotate with linear polish. With rotating mechanical polish is here exemple: Mechanical polish equipment is relatively simple, motivation and cast installation of CD, advanced polish relatively simple, motivation and cast candle of CD, advanced polish. Use chase the cloth that fine arenaceous bead makes form dish with cloth dish much talk makes a round trip for many times to undertake polishing is handled on outside inside the canal face, bright and clean degree can achieve Ra≤0.2-0.4μm.

Mechanical polish and electroanalysis polishing photograph has facility quite content of simple, technology is low master easily, cost cost is low also, won't destroy a canal and cause discard as useless, because this applies widely. But the surface imprints change a layer anti-corrosive ability electroanalysises many what polishing is close friends.
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