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Chemical Polishing Agent for Stainless Steel

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Release:
2007-10-21
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+86550-7961425
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qqhg@qqhg.com
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Introduce:

Adopting Chemical polishing agent from Japan; remove away 0.005mm raised surface(Ra≤0.05) on stainless steel through soaking methods,i.e.tiny burr, raw edge, acute angle. Its polishing capacity can obtain mirror level; surface is completely passivated with changing physical & chemical nature.Its surface has obvious smoothness, polishing, anticorrosion, adhesion resistance, beautiful appearance, cleanliness, sanitation.Its effect is better than electrolytic chemical polishing with low cost. It's applied for spaceflight, aviation, medical-treatment apparatus, chemcial equipment, electron, electric appliance, foods & pharmacy equipment, hardware parts, decoration and so on.

Technologic Feature: ???1

1 , abrasive & polishing for Austenitic stainless steel: SUS304 , 321 , 303 , 316 , 316L

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2 , not containing hydrofluoric acid, lower than 5% for acid-mist density.

3 , polishing pipe interior for stainless steel.
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Feature:

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1 , State: Liquid ???4

2 , Color: Yellow or Milk White ???5

3 , Taste: no special smell

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4 , Toxicity: innocuity

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5 , Weight : 1.02

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Abrasive Treatment Capacity

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1, According to different working surface and material,different polishing area for processing state, luster demand, treatment time; according to normal operation process,abrasive area for 1L abrasive mixing liquid,as follows:
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Stainless Steel ???9

Polishing Treatment Time ???4

Polishing Area

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  SUS304/303/321 ???2

     3 Minute ???5

     0.288M2 ???6

5 Minute ???1

     0.18M2 ???3

10 Minute

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     0.07M2

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  SUS316/316L ???1

3 Minute ???5

     0.14M2 ???5

5 Minute ???6

     0.09M2

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10 Minute

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     0.07M2 ???7

2, Depending on the following factors for surface area of abrasive polishing metal

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( 1 ) original surface state

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( 2 ) quality demand for processing surface

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( 3 ) polishing time
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Instruction: ???4

atment before polishing: ???8

1, Absorbent Dirt Removal:remove light adhesion:lubricant, polishing agent, dirt and so on. ???2

2, deoxidized layer:remove oxidized peel on stainless-steel surface for rolling, extension, , crimping, punching, weld. ???7

3, Container:glass, porcelain, titanic material, hearproof, aticorrosive vessel with glass fibre reinforced plastic; 1 time than volume of polishing solution.

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4, Temperature:heat to 9 5?? with liquefier or heating wire, when bubble boiling,add up a small quantity of bubble-removing agent.. ???4

5, Polishing:lightly put polished workpiece into polishing solution in full soaking,vibrate workpiece for complete contact with polishing agent,then take them out according to instruction,wash it with water immediately.

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Notice:

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1, For complicated shape, when put the parts once,mix them enough to avoid mutual adhesion. ???7

2, Before using polishing solution,check the area for stainless-steel parts. ???6

3, When not obvious luster or dirt spot,exchage polishing agent on time.

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4, Protective glass, veil, anticide glove, apron, rubber boots for operator

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5, Avoid to direct irradiation from sun, put polished parts in ventilative shades. ???4

the Theory for Chemical Polishing : ???8

h the parts on metal suface through soaking, changing physical & chemical property for passivation.Greatly improve the smoothness, luster, anticorrosion, adhesion resistance, beauty, sanitation on surface.Remove raised surface in 0.005mm,change the roughness, get rid of tiny burr,polish precision parts. No need of complicated equipment in short time for batch treatment,Better than electrolytic chemical polishing on effect.
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Introduction ???2

People think that stainless steel can't rust forever. However,stainless steel, the same as other metals,easily affected by the environment for hand & air contact. Besides,the surface can form tiny burr and raw edge; black oxidated layer through machinery processing,such as weld, pressing, crimp, heat treatment and so on. Generally it's difficult to remove them,easy to affect the exertion from workpiece. To settle the problems, people make polishing treatment on stainless-steel surface with different methods,as follows: ???4

     1, Machinery Polishing:

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     a: grinding wheel b: spray sand c: grinding d: extrusion    

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   2  Chemical Polishing:

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      a. electrolytic chemical; b. chemical             

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     3, Compound Polishing:       integration with nachinery polishing and chemical polishing ???5

         For different metals , using occasions, memands on metal surfance,we must make polishing treatment with different methods to satisfy it. ???9

2 ,   difference between chemical polishing, electrolytic polishing and machinery polishing ???2

 (1) Comparison from Chemical Polishing and Machinery Polishing ???5

    Chemical Polishing:firstly resolve tiny bulge to improve the roughness on metal surface ???8

    Machinery Polishing:cut and grind bulge to improve the smoothness and luster. ???3

     Different effects on metal surface for two kinds of polishing,changed property on metal surface.For the limitation of machinery polishing,it can't display effective function from metal workpiece. In the 1980's,new technique---electrolytic chemical polishing took on us,which has more obvious superiority than machinery polishing.But it still has some disadvantage

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  ( 2 ) Comparison from Chemical Polishing and Electrolytic Polishing

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     ?? Chemical Polishing:soak metal in special chemical solution,natually resolve metal surface on chemical energy.

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     ?? Electrolytic Chemical Polishing:soak metal in special solution,resolve metal surface on anode of current energy to obtain smooth surface.

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Chemical polishing is only simple soaking operation; electrolytic polishing is complicated on operation: large capacity of direct current,difficult quality control and treatment on special workpiece. Comparing with electrolytic polishing,chemical polishing technique can't satisfy importmant indexes,such as luster environmental protection, polishing effect. ???8

 

Chemical Rubbing ???4

Electrolytic Chemical Rubbing

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Machinery Rubbing ???6

1

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Obtaining lucent polishing surface on rubbed parts with chemical reaction dissolvent

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Obtaining lucent polishing surface on rubbed parts with anode dissolvent of electrochemical reaction

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Obtaining lucent polishing surface on rubbed parts with cutting, transfiguration, abrasion ???4

2 ???2

Form protective layer through chemical reaction for rubbed surface, improve anticorrosion, abrasion resistance with lasting luster. ???4

Equal to the left

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Form indurative layer and crystal lattice structure for transfiguration, lessen anticorrosion and abrasion resistance, no lasting luster for oxidation.

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3 ???8

Small smooth resistance on roughness, lasting smooth on rubbed surface

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Equal to the left
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Large smooth resistance on roughness,no lasting smooth on rubber surface ???3

4 ???3

No adhesion on rubber surface

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Equal to the left
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Impurity adhesion on rubber surface:metal granule, sand granule, rubbed, rubbed stearic and so on ???1

5 ???5

Easily remove tiny burr on rubbed surface(below 100μm)
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Difficultly remove tiny burr on rubber surface(beyond 100μm) ???6

Difficultly remove tiny burr on rubber surface(beyond 100μm) ???4

6

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Good reflex on rubbed surface,high refleting engergy, over 90% on positive reflecting rate
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Equal to the left
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Low reflecting energy for unorderly refex, 60% on positive reflecting rate ???2

7 ???2

No stress transfiguration on rubbed workpiece

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Equal to the left

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Stress transfiguration on workpiece after processing

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8 ???4

Increse 10~20% on antifatigue strength for small surface difference

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Equal to the left
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Fatigue strength

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9

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For electric substance,improve cold irradiation arc sparkle on contact surface to increase electric capability
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Equal to the left

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Bring about sparkle arc for raw edge

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1??

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Polish any sheet metal no matter complicated workpiece

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No treatment for workpiece for electric current

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Difficult to polish the workpiece with special shape
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11 ???4

Short time for polishing treatment

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Long time for polishing treatment

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Long time for polishing treatment ???4

12

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Extemely simple operational technique

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Complicated technical operation

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Difference from operational technician ???4

13

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Batch processing for small workpiece

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No volume-production for workpiece

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No volume-production for workpiece ???4

14 ???2

Small investment on equipment ???2

Large investment on equipment and technician

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A certain investment on equipment ???5

15

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No need of electric energy

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Large electric energy ???1

Small electric energy

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16 ???5

Unserious environmental pollution

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Serious environmental pollution

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Serious environmental pollution
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17 ???3

not remove deep nick for on polished surface ???4

Equal to the left

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remove deep nick for a certain time through the treatment

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18

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no treatment for some materials ???6

Equal to the left ???2

no effect from any meterial
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19

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Difficult for large workpiece

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Relatively difficult for large workpiece

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Treatment for large workpiece

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20 ???4

Strong Dependence on medicine

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Accessible chemical polishing solution, ???6

No disadvantage ???2

21

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Medium Cost

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High Cost

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Low Cost ???5

3 , the Theory for Chemical Polishing Reaction ???8

   Many scholars think that metal surface from chemical rubbing brings about partical electromotive force to form chemical resolvent for partial density difference, temperature difference, uneven resolved PH indicator.Electrolytic chemical rubbing bring about partical electromotive force to form chemical resolvent on external power(current distribution). There are many similarities between metal surface for chemical rubbing and electrolytic rubbing.People ususally think chemcial rubbing is the same as electrolytic rubbing on reaction mechanism for chemical natural resolvent and chemical anode resolvent. It's significant to develop chemical rubbing further.

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( 1 )           Introduction for Reaction Mechanism Theory

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    On chemical rubbing,it hasn't been uncertain about absolutely unified theory for many unclear contents. ???1

1, Different unsmooth resistance for current distribution ???2

2, Molecular diffused speed theory

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3, Distribution from partial electromotive force ???3

4, Machniery destroyed theory ???5

   a.Bring about large numbers of bubbles on rubbed surface for gas liquid effect; bring about machinery function when raised bubble deviation; dissolved by rubbing solution on destroyed surface.

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   b.Tension effect on surface, easliy changed tension on raised surface; destroyed and dissolved by rubbing solution on partial solution layer ???2

5, Active partial chemical reaction ???8

6, Surface crystal lattice theory: difference between crystal lattice

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7, Porous oxidation film theory:different film permeation

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    Although different explanation for chemical rubbing between above-mentioned theory, it's recognized for scholars to bring about smooth surface after ressolving tiny bulge on metal surface. ???4

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(2)Chemical Rubbing Mechanism Theory

  ???4

V= D(C o -C e ) / b ???9

  Diffused Speed: V diffused layer: b

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  Diffused speed coefficient: D

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  Metal ionic density in chemical rubbing solution: C o

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  Metal ionic density on metallic surface: C e ???7

  Thickness of concave diffused layer : V ?? small reaction resolvent

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  Thickness of concave diffused layer : V ?? small reaction resolvent

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( 2 )     Chemical Rubbing Burring Theory ???2





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