CN104250796A - Surface film passivation technology used before high-precision cast iron member coating - Google Patents
Surface film passivation technology used before high-precision cast iron member coating Download PDFInfo
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- CN104250796A CN104250796A CN201310271157.3A CN201310271157A CN104250796A CN 104250796 A CN104250796 A CN 104250796A CN 201310271157 A CN201310271157 A CN 201310271157A CN 104250796 A CN104250796 A CN 104250796A
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Abstract
The invention discloses a surface film passivation technology used before high-precision cast iron member coating. A passivation liquid used by the surface film passivation technology comprises, by weight, 10-12% of phytic acid, 1-2% of tartrate, 0.5-1.5% of citric acid, 0.5-0.7% of bromic acid, 2.5-3.5% of sodium benzoate, 0.35-0.55% of benzotriazole, 3.5-4.5% of triethanolamine, 2.3-2.7% of sodium carbonate, 0.4-0.6% of isothia-imidazolone, 1-2% of industrial alcohol and the balance water. The surface film passivation technology comprises the following steps of preparing the passivation liquid from the above components, putting the passivation liquid into a passivation tank, diluting the passivation liquid by 6-8 times, carrying out heating to a temperature of 55-75 DEG C, putting a machined high-precision cast iron member into the passivation tank, keeping the cast iron member for 90-120s, taking out the cast iron member, carrying out blow-drying so that one cast iron member passivation process is finished, and carrying out the above cast iron member passivation process 2-4 times.
Description
Technical field
The present invention relates to technical field of surface, particularly relate to epithelium passivation technology before the application of a kind of high precision ironcasting.
Background technology
Cast iron part should pass through bonderizing before spray-coating, makes its Surface Creation one deck have certain roughness, has the phosphatize phosphate coat of porousness adsorptivity.The Main Function of this layer of phosphatize phosphate coat is: one is strengthen the sticking power between cast iron part basic surface and spray-on coating; Two is the erosions of corrosive medium in the comprehensive resistance to air improving associating coating.But for high precision ironcasting, technical qualification regulation does not allow to adopt phosphating process to carry out pre-treatment, and requires that carrying out Passivation Treatment forms epithelium passivation layer up to standard.
To the technical requirements of processing work be generally: cast-iron blank first carries out shot peening through mechanical workout rear surface; Component after spray process must carry out epithelium Passivation Treatment; Carry out antirust for ready-made epithelium passivation film, require to adopt aqua antirust treatment, must not slushing oil be adopted; Trimestral rust-proof life must be ensured for cast iron part after above-mentioned process, and can not be got rusty by sea transport; Carry out after combination is assembled into complete machine to workpiece, direct spraying epoxy group(ing) priming paint and finish paint, can not affect the bonding force of spray-coating enamelled coating.
Reach above-mentioned technical requirements, the core technology solved is needed to mainly contain 2 points: one is under normal temperature condition, within the time of process stipulation, in the working fluid that processing parameter is determined, the chemical reaction of the epithelium passivation connecting complete densification can be realized on the surface at cast iron part, produced film, thickness is up to standard.There is reliable adsorptivity, tack, rust-preventing characteristic and meet the epithelium passive film of spray-on coating bonding strength.Two is cover one deck aqua antirust protective film on the surface again at epithelium passive film; require that this layer of protective membrane not only implements solid film process to passive film simultaneously; ensure also to pass through sea transport non-corrosive in the workpiece surface cycle of six months, the more important thing is and directly implement the bonding force that spray-coating does not affect enamelled coating.
Summary of the invention
The object of the invention is to propose epithelium passivation technology before the application of a kind of high precision ironcasting, this technique, by the adjustment to passivating solution component, meets technical requirements before the application of high precision ironcasting.
For reaching this object, the present invention by the following technical solutions:
Epithelium passivation technology before the application of a kind of high precision ironcasting, the passivating solution that this technique adopts is made up of following component by weight percentage: phytic acid 10-12%, tartrate 1-2%, citric acid 0.5-1.5%, bromic acid 0.5-0.7%, Sodium Benzoate 2.5-3.5%, benzotriazole 0.35-0.55%, trolamine 3.5-4.5%, sodium carbonate 2.3-2.7%, different Anthelvet ketone 0.4-0.6%, industrial spirit 1-2%, surplus is water; Described passivation technology is: by above-mentioned component preparation passivating solution, put into deactivation slot, dilution 6-8 doubly, be warming up to 55-75 DEG C, then high precision ironcasting good for machining put into deactivation slot, maintenance 90-120 took out after second, dry up, this process is calculated and is done 1 process, carries out altogether processing for 2-4 time.
The present invention has following technique effect:
The passivating solution that the present invention adopts is normal temperature passivated liquid, and wherein without chromic acid, phosphoric acid, potassium bichromate, sodium dichromate 99, the hazardous and noxious substances such as Sodium orthomolybdate or nitrite, on operator and environment without any impact.
The leather film thickness generated is suitable for, and does not affect the precision of ironcasting, has reliable adsorptivity, tack, rust-preventing characteristic simultaneously, and meet the requirement of spray-on coating bonding strength.
Embodiment
Embodiment one
Epithelium passivation technology before the application of a kind of high precision ironcasting, the passivating solution that this technique adopts is made up of following component by weight percentage: phytic acid 10%, tartrate 2%, citric acid 0.5%, bromic acid 0.7%, Sodium Benzoate 2.5%, benzotriazole 0.55%, trolamine 3.5%, sodium carbonate 2.7%, different Anthelvet ketone 0.4%, industrial spirit 2%, surplus is water; Described passivation technology is: by above-mentioned component preparation passivating solution, put into deactivation slot, dilute 6 times, be warming up to 75 DEG C, then high precision ironcasting good for machining put into deactivation slot, keep taking out after 90 seconds, dry up, this process is calculated and is done 1 process, carries out altogether processing for 4 times.
Embodiment two
Epithelium passivation technology before the application of a kind of high precision ironcasting, the passivating solution that this technique adopts is made up of following component by weight percentage: phytic acid 12%, tartrate 1%, citric acid 1.5%, bromic acid 0.5%, Sodium Benzoate 3.5%, benzotriazole 0.35%, trolamine 4.5%, sodium carbonate 2.3%, different Anthelvet ketone 0.6%, industrial spirit 1%, surplus is water; Described passivation technology is: by above-mentioned component preparation passivating solution, put into deactivation slot, dilute 8 times, be warming up to 55 DEG C, then high precision ironcasting good for machining put into deactivation slot, keep taking out after 120 seconds, dry up, this process is calculated and is done 1 process, carries out altogether processing for 2 times.
Embodiment three
Epithelium passivation technology before the application of a kind of high precision ironcasting, the passivating solution that this technique adopts is made up of following component by weight percentage: phytic acid 11%, tartrate 1.5%, citric acid 1.0%, bromic acid 0.6%, Sodium Benzoate 3.0%, benzotriazole 0.45%, trolamine 4.0%, sodium carbonate 2.5%, different Anthelvet ketone 0.5%, industrial spirit 1-2%, surplus is water; Described passivation technology is: by above-mentioned component preparation passivating solution, put into deactivation slot, dilution 6-8 doubly, be warming up to 55-75 DEG C, then high precision ironcasting good for machining put into deactivation slot, maintenance 90-120 took out after second, dry up, this process is calculated and is done 1 process, carries out altogether processing for 2-4 time.
Claims (1)
1. an epithelium passivation technology before the application of high precision ironcasting, is characterized in that, the passivating solution that this technique adopts is made up of following component by weight percentage: phytic acid 10-12%, tartrate 1-2%, citric acid 0.5-1.5%, bromic acid 0.5-0.7%, Sodium Benzoate 2.5-3.5%, benzotriazole 0.35-0.55%, trolamine 3.5-4.5%, sodium carbonate 2.3-2.7%, different Anthelvet ketone 0.4-0.6%, industrial spirit 1-2%, surplus is water; Described passivation technology is: by above-mentioned component preparation passivating solution, put into deactivation slot, dilution 6-8 doubly, be warming up to 55-75 DEG C, then high precision ironcasting good for machining put into deactivation slot, maintenance 90-120 took out after second, dry up, this process is calculated and is done 1 process, carries out altogether processing for 2-4 time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310271157.3A CN104250796A (en) | 2013-06-28 | 2013-06-28 | Surface film passivation technology used before high-precision cast iron member coating |
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| CN201310271157.3A CN104250796A (en) | 2013-06-28 | 2013-06-28 | Surface film passivation technology used before high-precision cast iron member coating |
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| CN104250796A true CN104250796A (en) | 2014-12-31 |
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| CN201310271157.3A Pending CN104250796A (en) | 2013-06-28 | 2013-06-28 | Surface film passivation technology used before high-precision cast iron member coating |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108118322A (en) * | 2016-11-29 | 2018-06-05 | 北京爱尔斯姆科技有限公司 | Coated metal environment-friendly antirust idol chain agent BW-210 |
-
2013
- 2013-06-28 CN CN201310271157.3A patent/CN104250796A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108118322A (en) * | 2016-11-29 | 2018-06-05 | 北京爱尔斯姆科技有限公司 | Coated metal environment-friendly antirust idol chain agent BW-210 |
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Application publication date: 20141231 |