Chemical Polishing Agent for Stainless Steel
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: 字串1
1 , abrasive & polishing for Austenitic stainless steel: SUS304 , 321 , 303 , 316 , 316L
2 , not containing hydrofluoric acid, lower than 5% for acid-mist density.
3 , polishing pipe interior for stainless steel.
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Feature:
1 , State: Liquid 字串4
2 , Color: Yellow or Milk White 字串5
3 , Taste: no special smell
4 , Toxicity: innocuity
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5 , Weight : 1.02
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 字串9 |
Polishing Treatment Time 字串4 |
Polishing Area 字串2
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SUS304/303/321 字串2 |
3 Minute 字串5 |
0.288M2 字串6 |
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5 Minute 字串1 |
0.18M2 字串3 |
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10 Minute 字串8 |
0.07M2 字串1
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SUS316/316L 字串1 |
3 Minute 字串5 |
0.14M2 字串5 |
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5 Minute 字串6 |
0.09M2 字串4 |
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10 Minute 字串1 |
0.07M2 字串7 |
2, Depending on the following factors for surface area of abrasive polishing metal
( 1 ) original surface state
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( 2 ) quality demand for processing surface
( 3 ) polishing time
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Instruction: 字串4
atment before polishing: 字串8
1, Absorbent Dirt Removal:remove light adhesion:lubricant, polishing agent, dirt and so on. 字串2
2, deoxidized layer:remove oxidized peel on stainless-steel surface for rolling, extension, , crimping, punching, weld. 字串7
3, Container:glass, porcelain, titanic material, hearproof, aticorrosive vessel with glass fibre reinforced plastic; 1 time than volume of polishing solution.
4, Temperature:heat to 9 5℃ with liquefier or heating wire, when bubble boiling,add up a small quantity of bubble-removing agent.. 字串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.
Notice:
1, For complicated shape, when put the parts once,mix them enough to avoid mutual adhesion. 字串7
2, Before using polishing solution,check the area for stainless-steel parts. 字串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. 字串4
the Theory for Chemical Polishing : 字串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 字串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: 字串4
1, Machinery Polishing:
a: grinding wheel b: spray sand c: grinding d: extrusion
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2 Chemical Polishing:
a. electrolytic chemical; b. chemical
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3, Compound Polishing: integration with nachinery polishing and chemical polishing 字串5
For different metals , using occasions, memands on metal surfance,we must make polishing treatment with different methods to satisfy it. 字串9
2 , difference between chemical polishing, electrolytic polishing and machinery polishing 字串2
(1) Comparison from Chemical Polishing and Machinery Polishing 字串5
Chemical Polishing:firstly resolve tiny bulge to improve the roughness on metal surface 字串8
Machinery Polishing:cut and grind bulge to improve the smoothness and luster. 字串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
★ 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.
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. 字串8
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Chemical Rubbing 字串4 |
Electrolytic Chemical Rubbing 字串6
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Machinery Rubbing 字串6 |
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1 字串1 |
Obtaining lucent polishing surface on rubbed parts with chemical reaction dissolvent 字串1 |
Obtaining lucent polishing surface on rubbed parts with anode dissolvent of electrochemical reaction 字串4 |
Obtaining lucent polishing surface on rubbed parts with cutting, transfiguration, abrasion 字串4 |
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2 字串2 |
Form protective layer through chemical reaction for rubbed surface, improve anticorrosion, abrasion resistance with lasting luster. 字串4 |
Equal to the left 字串1
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Form indurative layer and crystal lattice structure for transfiguration, lessen anticorrosion and abrasion resistance, no lasting luster for oxidation. 字串6
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3 字串8 |
Small smooth resistance on roughness, lasting smooth on rubbed surface 字串4 |
Equal to the left |
Large smooth resistance on roughness,no lasting smooth on rubber surface 字串3 |
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4 字串3 |
No adhesion on rubber surface 字串5 |
Equal to the left |
Impurity adhesion on rubber surface:metal granule, sand granule, rubbed, rubbed stearic and so on 字串1 |
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5 字串5 |
Easily remove tiny burr on rubbed surface(below 100μm) |
Difficultly remove tiny burr on rubber surface(beyond 100μm) 字串6 |
Difficultly remove tiny burr on rubber surface(beyond 100μm) 字串4 |
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6 字串1
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Good reflex on rubbed surface,high refleting engergy, over 90% on positive reflecting rate |
Equal to the left |
Low reflecting energy for unorderly refex, 60% on positive reflecting rate 字串2 |
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7 字串2 |
No stress transfiguration on rubbed workpiece 字串2 |
Equal to the left 字串7 |
Stress transfiguration on workpiece after processing 字串9
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8 字串4 |
Increse 10~20% on antifatigue strength for small surface difference 字串5 |
Equal to the left |
Fatigue strength 字串1 |
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9 字串2 |
For electric substance,improve cold irradiation arc sparkle on contact surface to increase electric capability |
Equal to the left 字串3 |
Bring about sparkle arc for raw edge 字串4
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1０ 字串4
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Polish any sheet metal no matter complicated workpiece 字串3
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No treatment for workpiece for electric current 字串1 |
Difficult to polish the workpiece with special shape |
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11 字串4 |
Short time for polishing treatment 字串8
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Long time for polishing treatment 字串6 |
Long time for polishing treatment 字串4 |
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12 字串7 |
Extemely simple operational technique 字串4 |
Complicated technical operation 字串8 |
Difference from operational technician 字串4 |
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13 字串8
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Batch processing for small workpiece 字串6 |
No volume-production for workpiece 字串4 |
No volume-production for workpiece 字串4 |
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14 字串2 |
Small investment on equipment 字串2 |
Large investment on equipment and technician 字串5 |
A certain investment on equipment 字串5 |
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15 字串2
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No need of electric energy 字串6 |
Large electric energy 字串1 |
Small electric energy 字串5 |
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16 字串5 |
Unserious environmental pollution 字串6 |
Serious environmental pollution 字串6 |
Serious environmental pollution |
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17 字串3 |
not remove deep nick for on polished surface 字串4 |
Equal to the left 字串4 |
remove deep nick for a certain time through the treatment 字串4
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18 字串2 |
no treatment for some materials 字串6 |
Equal to the left 字串2 |
no effect from any meterial |
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19 字串9 |
Difficult for large workpiece 字串7
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Relatively difficult for large workpiece 字串2
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Treatment for large workpiece 字串6
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20 字串4 |
Strong Dependence on medicine 字串8 |
Accessible chemical polishing solution, 字串6 |
No disadvantage 字串2 |
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21 字串2 |
Medium Cost 字串3
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High Cost 字串9
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Low Cost 字串5 |
3 , the Theory for Chemical Polishing Reaction 字串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.
( 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. 字串1
1, Different unsmooth resistance for current distribution 字串2
2, Molecular diffused speed theory
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3, Distribution from partial electromotive force 字串3
4, Machniery destroyed theory 字串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 字串2
5, Active partial chemical reaction 字串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. 字串4
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(2)Chemical Rubbing Mechanism Theory
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V= D(C o -C e ) / b 字串9
Diffused Speed: V diffused layer: b
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Diffused speed coefficient: D
Metal ionic density in chemical rubbing solution: C o
Metal ionic density on metallic surface: C e 字串7
Thickness of concave diffused layer : V ， small reaction resolvent
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Thickness of concave diffused layer : V ， small reaction resolvent
( 2 ) Chemical Rubbing Burring Theory 字串2
