CN102877069B - Ferro-aluminum composite metal corrosion inhibitor and preparation method thereof - Google Patents
Ferro-aluminum composite metal corrosion inhibitor and preparation method thereof Download PDFInfo
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- CN102877069B CN102877069B CN 201210386356 CN201210386356A CN102877069B CN 102877069 B CN102877069 B CN 102877069B CN 201210386356 CN201210386356 CN 201210386356 CN 201210386356 A CN201210386356 A CN 201210386356A CN 102877069 B CN102877069 B CN 102877069B
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Abstract
The invention provides a ferro-aluminum composite metal corrosion inhibitor and a preparation method thereof. The ferro-aluminum composite metal corrosion inhibitor comprises, by mass, 8-10% of triethanolamine, 3-6% of borax, 1-2% of 1-hydroxyethane-1,1-diphosphonic acid (HEDP), 6-8% of sodium citrate, 2-4% of glucose, 3-5% of urotropine and the balance water. The preparation method includes mixing the substances by the mass ratio with water, performing slight heating to enable the substances to fully dissolve into the water, and performing even stirring. Compared with the existing corrosion inhibitors which only have a certain anti-corrosion effect on single metal, the formula which has a protective effect on ferro-aluminum composite metal is adopted, and all substances in the ferro-aluminum composite metal corrosion inhibitor are biodegradable and environment-friendly.
Description
Technical field
The invention belongs to the metal corrosion and protection field, particularly a kind of ferro-aluminum composition metal inhibiter and preparation method thereof.
Background technology
Inhibiter is a kind ofly can stop or slow down the material that metal corrodes in surrounding medium under lower concentration.The inhibiter resist technology has developed into an important anticorrosion technique, extensively is used in the departments such as oil, metallurgy, chemical industry, machinofacture, power and transportation.In the existing anti-corrosion technology, generally all can only play to single metal certain corrosion-resisting function, such as single iron and steel or single aluminium alloy.Because the current potential of iron and aluminium is different, the current potential of aluminium is lower than iron, and the aluminium of low potential is corroded first in medium easily as anode, and therefore, inhibiter can't play certain protection effect to the ferro-aluminum composition metal in the prior art; And some composition such as the materials such as Sodium Nitrite, chromic salt belong to carcinogenic substance, contaminate environment in the inhibiter commonly used at present.
Summary of the invention
The object of the present invention is to provide a kind of ferro-aluminum composition metal inhibiter that prevents the ferroaluminium corrosion and preparation method thereof.
The technical solution that realizes the object of the invention is:
A kind of ferro-aluminum composition metal inhibiter comprises the following composition that is calculated in mass percent: trolamine 8～10%, borax 3～6%, HEDP1～2%, trisodium citrate 6～8%, glucose 2～4%, urotropine 3～5%, remaining content are water.
A kind of preparation method of ferro-aluminum composition metal inhibiter, with thanomin, borax, HEDP, trisodium citrate, glucose, urotropine and water mix, add low-grade fever, be the fully dissolvings in water of these materials, and stir; Wherein the mass percent of trolamine is 8～10%, the mass percent of borax is 3～6%, the mass percent of HEDP is 1～2%, the mass percent of trisodium citrate is 6～8%, the mass percent of glucose is 2～4%, the mass percent of urotropine is 3～5%.
The present invention compared with prior art, its remarkable advantage:
(1) ferro-aluminum composition metal inhibiter of the present invention is compared the situation that can only play to single metal certain corrosion-resisting function of existing inhibiter, and having adopted can be to the get up prescription of protective effect of ferro-aluminum composition metal.
(2) the various materials in the ferro-aluminum composition metal inhibiter of the present invention are biodegradable, belong to environmentally friendly material.
Embodiment
A kind of ferro-aluminum composition metal of the present invention inhibiter comprises the following composition that is calculated in mass percent: trolamine 8～10%, borax 3～6%, HEDP1～2%, trisodium citrate 6～8%, glucose 2～4%, urotropine 3～5%, remaining content are water.
The preparation method of a kind of ferro-aluminum composition metal of the present invention inhibiter, with thanomin, borax, HEDP, trisodium citrate, glucose, urotropine and water mix, add low-grade fever, be the fully dissolvings in water of these materials, and stir; Wherein the mass percent of trolamine is 8～10%, the mass percent of borax is 3～6%, the mass percent of HEDP is 1～2%, the mass percent of trisodium citrate is 6～8%, the mass percent of glucose is 2～4%, the mass percent of urotropine is 3～5%, and all the other content are water.
Trolamine, trisodium citrate, glucose and urotropine belong to absorption membranous type inhibiter, and the protection metal is not corroded by medium thereby its active group can be adsorbed in the metallic surface; HEDP belongs to precipitation membranous type inhibiter, and it generates inner complex formation precipitation membrane with calcium ions and magnesium ions reaction in the water and is attached to the metallic surface; Borax belongs to the type oxide film inhibiter, thereby can generate passive film with the water oxygen ionic reaction metal is played protective effect.Above several materials are mixed by a certain percentage composite, be ferro-aluminum composition metal inhibiter of the present invention, this compound corrosion inhibitor can play good corrosion inhibition to the ferro-aluminum composition metal.
Embodiment 1: a kind of ferro-aluminum composition metal inhibiter, comprise that remaining content is water take glucose as 3% of trisodium citrate as 8% of HEDP as 1.5% of borax as 5% of the trolamine of mass percent as 8%, mass percent, mass percent, mass percent, mass percent, the mass percent urotropine as 3%; These materials are mixed in water, be heated to 55 ℃, be 10 minutes heat-up time, makes the fully dissolving in water of these materials, and stir, and just obtained ferro-aluminum composition metal inhibiter of the present invention.
The outside workpiece of automobile engine cylinder-body belongs to aluminium alloy, and iron and steel is inlayed in inside.Ferro-aluminum composition metal inhibiter of the present invention is used for the curing process of automobile engine cylinder-body after infiltration, can play good protective effect to automobile engine cylinder-body, so that it is not corroded in 90 ℃ of high-temperature water, can preserve for some time does not simultaneously corrode.Automobile engine cylinder-body is used composite corrosion inhibitor of the present invention when solidifying, behind the 15min, automobile engine cylinder-body is not any change in 94 ℃ of water of high temperature, deposit simultaneously 15 days after, iron non-corrosive, aluminium alloy nondiscoloration after 3 months.
The static corrosion experiment, aluminium and iron test piece are all placed in 94 ℃ of water, add ferro-aluminum composition metal inhibiter of the present invention, take out test piece behind the 15min, survey its year erosion rate and corrosion inhibition rate after 3 months are placed in the aluminium test piece, and the iron test piece is placed after 15 days and surveyed its erosion rate and corrosion inhibition rate.The results are shown in following table.
| ? | Year erosion rate (mm/a) | Corrosion inhibition rate (%) |
| The aluminium test piece | 00.12 | 99.5 |
| The iron test piece | 0.018 | 99.3 |
Embodiment 2: a kind of ferro-aluminum composition metal inhibiter, comprise that remaining content is water take glucose as 4% of trisodium citrate as 7% of HEDP as 1% of borax as 3% of the trolamine of mass percent as 9%, mass percent, mass percent, mass percent, mass percent, the mass percent urotropine as 4%; These materials are mixed in water, be heated to 40 ℃, be 15 minutes heat-up time, makes the fully dissolving in water of these materials, and stir, and just obtained ferro-aluminum composition metal inhibiter of the present invention.
The outside workpiece of automobile engine cylinder-body belongs to aluminium alloy, and iron and steel is inlayed in inside.Ferro-aluminum composition metal inhibiter of the present invention is used for the curing process of automobile engine cylinder-body after infiltration, can play good protective effect to automobile engine cylinder-body, so that it is not corroded in 90 ℃ of high-temperature water, can preserve for some time does not simultaneously corrode.Automobile engine cylinder-body is used composite corrosion inhibitor of the present invention when solidifying, behind the 15min, automobile engine cylinder-body is not any change in 94 ℃ of water of high temperature, deposit simultaneously 15 days after, iron non-corrosive, aluminium alloy nondiscoloration after 3 months.
The static corrosion experiment, aluminium and iron test piece are all placed in 94 ℃ of water, add ferro-aluminum composition metal inhibiter of the present invention, take out test piece behind the 15min, survey its year erosion rate and corrosion inhibition rate after 3 months are placed in the aluminium test piece, and the iron test piece is placed after 15 days and surveyed its erosion rate and corrosion inhibition rate.The results are shown in following table.
| ? | Year erosion rate (mm/a) | Corrosion inhibition rate (%) |
| The aluminium test piece | 0.019 | 99.2 |
| The iron test piece | 0.022 | 99.1 |
Embodiment 3: a kind of ferro-aluminum composition metal inhibiter, comprise that remaining content is water take glucose as 2% of trisodium citrate as 6% of HEDP as 2% of borax as 6% of the trolamine of mass percent as 10%, mass percent, mass percent, mass percent, mass percent, the mass percent urotropine as 5%; These materials are mixed in water, be heated to 60 ℃, be 15 minutes heat-up time, makes the fully dissolving in water of these materials, and stir, and just obtained ferro-aluminum composition metal inhibiter of the present invention.
The outside workpiece of automobile engine cylinder-body belongs to aluminium alloy, and iron and steel is inlayed in inside.Ferro-aluminum composition metal inhibiter of the present invention is used for the curing process of automobile engine cylinder-body after infiltration, can play good protective effect to automobile engine cylinder-body, so that it is not corroded in 90 ℃ of high-temperature water, can preserve for some time does not simultaneously corrode.Automobile engine cylinder-body is used composite corrosion inhibitor of the present invention when solidifying, behind the 15min, automobile engine cylinder-body is not any change in 94 ℃ of water of high temperature, deposit simultaneously 15 days after, iron non-corrosive, aluminium alloy nondiscoloration after 3 months.
The static corrosion experiment, aluminium and iron test piece are all placed in 94 ℃ of water, add ferro-aluminum composition metal inhibiter of the present invention, take out test piece behind the 15min, survey its year erosion rate and corrosion inhibition rate after 3 months are placed in the aluminium test piece, and the iron test piece is placed after 15 days and surveyed its erosion rate and corrosion inhibition rate.The results are shown in following table.
| ? | Year erosion rate (mm/a) | Corrosion inhibition rate (%) |
| The aluminium test piece | 0.005 | 99.8 |
| The aluminium test piece | 0.007 | 99.7 |
By above static corrosion experiment as can be known, in the ferro-aluminum compound slow corrosion agent prescription, the trolamine mass percent is 10%, the borax mass percent is 6%, the HEDP mass percent is 2%, the trisodium citrate mass percent is 6%, glucose 2%, urotropine 5%, the corrosion inhibition rate of ferro-aluminum test piece is the highest, can arrive more than 99.5%, the corrosion mitigating effect of the ferro-aluminum composite corrosion inhibitor of this prescription is best.
Claims (3)
1. a ferro-aluminum composition metal inhibiter is characterized in that, comprises the following composition that is calculated in mass percent: trolamine 8 ~ 10%, borax 3 ~ 6%, HEDP1 ~ 2%, trisodium citrate 6 ~ 8%, glucose 2 ~ 4%, urotropine 3 ~ 5%, remaining content are water.
2. the preparation method of a ferro-aluminum composition metal inhibiter is characterized in that: trolamine, borax, HEDP, trisodium citrate, glucose, urotropine and water are mixed, add low-grade fever, make the fully dissolving in water of these materials, and stir; Wherein the mass percent of trolamine is 8 ~ 10%, the mass percent of borax is 3 ~ 6%, the mass percent of HEDP is 1 ~ 2%, the mass percent of trisodium citrate is 6 ~ 8%, the mass percent of glucose is 2 ~ 4%, the mass percent of urotropine is 3 ~ 5%.
3. the preparation method of a kind of ferro-aluminum composition metal inhibiter according to claim 2, it is characterized in that: the described low-grade fever that adds refers to that Heating temperature is 40 ~ 60 ℃, and be 10 ~ 15 minutes heat-up time.
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