MD4245C1 - Inhibitor of steel corrosion in water - Google Patents
Inhibitor of steel corrosion in waterInfo
- Publication number
- MD4245C1 MD4245C1 MDA20120047A MD20120047A MD4245C1 MD 4245 C1 MD4245 C1 MD 4245C1 MD A20120047 A MDA20120047 A MD A20120047A MD 20120047 A MD20120047 A MD 20120047A MD 4245 C1 MD4245 C1 MD 4245C1
- Authority
- MD
- Moldova
- Prior art keywords
- water
- inhibitor
- corrosion
- concentration
- hours
- Prior art date
Links
- 230000007797 corrosion Effects 0.000 title claims abstract description 26
- 238000005260 corrosion Methods 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 11
- 239000010959 steel Substances 0.000 title claims abstract description 11
- 239000003112 inhibitor Substances 0.000 title claims description 18
- DAEPDZWVDSPTHF-UHFFFAOYSA-M sodium pyruvate Chemical compound [Na+].CC(=O)C([O-])=O DAEPDZWVDSPTHF-UHFFFAOYSA-M 0.000 claims description 24
- 229940054269 sodium pyruvate Drugs 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 150000002739 metals Chemical class 0.000 abstract description 2
- LCTONWCANYUPML-UHFFFAOYSA-N Pyruvic acid Chemical compound CC(=O)C(O)=O LCTONWCANYUPML-UHFFFAOYSA-N 0.000 description 9
- 230000007423 decrease Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 229940107700 pyruvic acid Drugs 0.000 description 3
- ZKHQWZAMYRWXGA-KQYNXXCUSA-J ATP(4-) Chemical compound C1=NC=2C(N)=NC=NC=2N1[C@@H]1O[C@H](COP([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O)[C@@H](O)[C@H]1O ZKHQWZAMYRWXGA-KQYNXXCUSA-J 0.000 description 2
- ZKHQWZAMYRWXGA-UHFFFAOYSA-N Adenosine triphosphate Natural products C1=NC=2C(N)=NC=NC=2N1C1OC(COP(O)(=O)OP(O)(=O)OP(O)(O)=O)C(O)C1O ZKHQWZAMYRWXGA-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000004060 metabolic process Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 159000000000 sodium salts Chemical class 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- 229910021532 Calcite Inorganic materials 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- QNAYBMKLOCPYGJ-REOHCLBHSA-N L-alanine Chemical compound C[C@H](N)C(O)=O QNAYBMKLOCPYGJ-REOHCLBHSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 235000004279 alanine Nutrition 0.000 description 1
- 235000001014 amino acid Nutrition 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 230000003851 biochemical process Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 235000010216 calcium carbonate Nutrition 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000004098 cellular respiration Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000037149 energy metabolism Effects 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 230000037394 skin elasticity Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000005891 transamination reaction Methods 0.000 description 1
- 230000004102 tricarboxylic acid cycle Effects 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Landscapes
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
Invenţia se referă la domeniul protecţiei anticorozive a metalelor în apă şi poate fi utilizată pentru inhibarea coroziunii în sistemele de conducte închise din oţel.Conform invenţiei, se revendică aplicarea piruvatului de sodiu în calitate de inhibitor de coroziune a oţelului în apă, la o concentraţie de 0,05…1,00 g/l.The invention relates to the field of anticorrosive protection of metals in water and can be used to inhibit corrosion in closed steel pipe systems. 0.05… 1.00 g / l.
Description
Invenţia se referă la domeniul protecţiei anticorozive a metalelor în apă şi poate fi utilizată pentru inhibarea coroziunii în sistemele de conducte închise din oţel. The invention relates to the field of corrosion protection of metals in water and can be used to inhibit corrosion in closed steel piping systems.
Este cunoscut faptul că apa naturală sau cea tehnică conţine ioni de Cl- şi SO4 2- şi este un mediu destul de agresiv, în care coroziunea oţelului decurge cu o viteză relativ mare. De exemplu, apa din conductele de apă din mun. Chişinău conţine (mg/1): Ca2+ - 72,5, Mg2+ - 19,5, HCO3 - - 97,6, SO4 2- - 203,7, Cl- - 56,7, conţinutul total al sărurilor fiind de 0,457 g/l. Viteza de coroziune a oţelului „Ст. 3” la expunerea lui în astfel de apă timp de 8 ore este destul de mare, atingând valoarea de 21,0 g/m2·24 ore. La mărirea timpului de expunere viteza de coroziune se micşorează (de exemplu până la 12 g/m2·24 ore la expunerea timp de 24 ore, 6,6 g/m2·24 ore la expunerea timp de 72 ore, 4 g/m2·24 ore la expunerea timp de 240 ore), datorită formării pe suprafaţa supusă coroziunii a unei pelicule oxido-hidroxidice din produsele coroziunii, precum şi a depunerii calcitului CaCO3 (Паршутин В. В., Шолтоян Н. С., Сидельникова С. П., Володина Г. Ф. Ингибирование бороглюконатом кальция коррозии углеродистой стали Ст. 3 в воде. Коррозия в условиях естественной аэрации и принудительной конвекции. Электронная обработка материалов, 1999, № 5, с. 42-56). It is known that natural or technical water contains Cl- and SO4 2- ions and is a rather aggressive environment, in which steel corrosion proceeds at a relatively high speed. For example, the water from the water pipes in the municipality of Chisinau contains (mg/1): Ca2+ - 72.5, Mg2+ - 19.5, HCO3 - - 97.6, SO4 2- - 203.7, Cl- - 56 ,7, the total salt content being 0.457 g/l. The corrosion rate of steel "St. 3” when exposed to such water for 8 hours is quite high, reaching the value of 21.0 g/m2·24 hours. As the exposure time increases, the corrosion rate decreases (e.g. up to 12 g/m2·24 hours at 24-hour exposure, 6.6 g/m2·24 hours at 72-hour exposure, 4 g/m2· 24 hours after exposure for 240 hours), due to the formation on the corroded surface of an oxide-hydroxide film from corrosion products, as well as the deposition of calcite CaCO3 (Паршутин В. В., Шолтоян Н. С., Сидельникова С. П. , Volodina G. F. Ингибирование бороглюконатом калция корозии угробистой стали St. 3 in water. Corrosion in the conditions of natural aeration and forced convection. Electronic processing of materials, 1999, № 5, p. 42-56).
Ionii SO4 2- cauzează o coroziune totală, destul de uniformă, dar în prezenţa ionilor de Cl- (ca un agent de activare), pe suprafaţa internă a conductelor se pot forma pittinguri adânci, care în unele cazuri pot străbate grosimea pereţilor, ceea ce poate duce la situaţii accidentale. În plus, fierul ionizat se acumulează în apă, ca urmare scade calitatea acesteia. SO4 2- ions cause a total, fairly uniform corrosion, but in the presence of Cl- ions (as an activating agent), deep pitting can form on the internal surface of the pipes, which in some cases can go through the thickness of the walls, which can lead to accidental situations. In addition, ionized iron accumulates in water, as a result of which its quality decreases.
În calitate de cea mai apropiată soluţie serveşte utilizarea în calitate de inhibitor de coroziune a oţelului în apă a aminoguanizonei acidului piruvic în concentraţie de 0,05...1,00 g/l. La aplicarea ei, în unele cazuri, se obţine reducerea vitezei de coroziune aproape de 9 ori [1]. The closest solution is the use of pyruvic acid aminoguanisone in a concentration of 0.05...1.00 g/l as a steel corrosion inhibitor in water. When applying it, in some cases, the corrosion rate is reduced almost 9 times [1].
Dezavantajul inhibitorului cunoscut constă în aceea că se observă un efect neuniform privind influenţa inhibitorului asupra procesului de coroziune într-un interval de timp, în funcţie de durata expunerii. The disadvantage of the known inhibitor is that a non-uniform effect is observed regarding the influence of the inhibitor on the corrosion process in a time interval, depending on the duration of the exposure.
Problema tehnică pe care o rezolvă invenţia constă în mărirea rezistenţei la coroziune a sistemelelor de conducte închise din oţel prin care se pompează apă. The technical problem that the invention solves consists in increasing the corrosion resistance of closed steel pipe systems through which water is pumped.
Problema se soluţionează prin aceea că se propune aplicarea piruvatului de sodiu în calitate de inhibitor de coroziune a oţelului în apă, la o concentraţie de 0,05…1,00 g/l. The problem is solved by proposing the application of sodium pyruvate as a steel corrosion inhibitor in water, at a concentration of 0.05...1.00 g/l.
Piruvatul de sodiu (C3H3NaO3) este o sare stabilă a acidului piruvic. Denumirea alternativă a acestei substanţe este: sare de sodiu a acidului alfa-ketopropionic, sare de sodiu a acidului 2-oxopropionic. Compusul se dizolvă în apă (la 25°С 100 mg/ml). Piruvatul de sodiu este implicat şi în multe procese biochimice. Este cel mai important produs intermediar în metabolismul energetic, în multe medii se adaugă ca o sursă suplimentară de energie. Piruvatul de sodiu stimulează respiraţia celulară, ducând la creşterea metabolismului cu eliberare de energie, atât în procesele aerobe (ciclul Krebs), cât şi în procesele anaerobe. Piruvatul de sodiu activează dezagregarea grăsimilor, îmbunătăţeşte fluxul de glucoză din sânge în ţesutul muscular. Este, de asemenea, implicat în restaurarea adenozintrifosfatului (ATP), este folosit pentru combaterea ridurilor şi îmbunătăţirea elasticităţii pielii. Piruvatul de sodiu este implicat în metabolismul aminoacizilor şi poate fi utilizat în producţia alaninei la transaminare. Piruvatul de sodiu poate avea, de asemenea, un efect de protejare împotriva peroxidului de hidrogen în celulele vii (Giandomenico A., Cerniglia G., Biaglow J., Stevens C., Koch C. The importance of sodium pyruvate in assessing damage produced by hydrogen peroxide. Free Radical Biology & Medicine, 1997, vol. 23, No. 3, p. 426-434, Coman Gh., Badea M., Drăghici C., Dumitrescu L., Tiut M. Biochimie, Reacţii care se desfăşoară în celulele vii. Editura Ermetic, 2003, p. 236). Sodium pyruvate (C3H3NaO3) is a stable salt of pyruvic acid. The alternative name of this substance is: sodium salt of alpha-ketopropionic acid, sodium salt of 2-oxopropionic acid. The compound dissolves in water (at 25°С 100 mg/ml). Sodium pyruvate is also involved in many biochemical processes. It is the most important intermediate product in energy metabolism, in many environments it is added as an additional source of energy. Sodium pyruvate stimulates cellular respiration, leading to increased metabolism with energy release, both in aerobic processes (Krebs cycle) and in anaerobic processes. Sodium pyruvate activates the breakdown of fats, improves the flow of glucose from the blood into the muscle tissue. It is also involved in the restoration of adenosine triphosphate (ATP), it is used to fight wrinkles and improve skin elasticity. Sodium pyruvate is involved in the metabolism of amino acids and can be used in the production of alanine during transamination. Sodium pyruvate can also have a protective effect against hydrogen peroxide in living cells (Giandomenico A., Cerniglia G., Biaglow J., Stevens C., Koch C. The importance of sodium pyruvate in assessing damage produced by hydrogen peroxide. Free Radical Biology & Medicine, 1997, vol. 23, No. 3, p. 426-434, Coman Gh., Badea M., Drăghici C., Dumitrescu L., Tiut M. Biochemistry, Reactions that take place in living cells. Ermetic Publishing House, 2003, p. 236).
Rezultatul soluţiei propuse constă în micşorarea esenţială a pierderilor corozive şi mărirea termenului de exploatare a conductelor. The result of the proposed solution consists in the essential reduction of the corrosive losses and the increase of the term of operation of the pipelines.
Exemplu de realizare a invenţiei Example of realization of the invention
Testul de coroziune se efectuează pe mostre de mărimea 50x25x3 mm, prin imersie completă în soluţie, la aceeaşi adâncime cu acces de aer. Rugozitatea lor iniţială se înlătură prin lustruire. Pierderile corozive se înregistrează gravimetric. The corrosion test is performed on samples of size 50x25x3 mm, by complete immersion in the solution, at the same depth with air access. Their initial roughness is removed by polishing. Corrosive losses are recorded gravimetrically.
Efectul acţiunii inhibitorului se evaluează cantitativ după viteza de coroziune k1, g/m2·24 ore şi valoarea coeficientului de frânare γ = k/k1, unde k1, k - viteza de coroziune a metalului în apă cu inhibitor şi, respectiv, în absenţa acestuia. Acest raport arată de câte ori scade viteza de coroziune în urma acţiunii inhibitorului. The effect of the inhibitor's action is quantitatively evaluated by the corrosion rate k1, g/m2·24 hours and the value of the braking coefficient γ = k/k1, where k1, k - the corrosion rate of the metal in water with the inhibitor and, respectively, in its absence . This ratio shows how many times the corrosion rate decreases due to the action of the inhibitor.
Datele privind influenţa concentraţiei inhibitorului şi a timpului de expunere asupra vitezei de coroziune k1, g/m2·24 ore şi coeficientului de frânare γ sunt indicate în tabel. Din aceste date se vede că cel mai mare efect se atinge la folosirea inhibitorului (piruvatului de sodiu) în concentraţie de 0,05...0,75 g/l. Astfel, la concentraţia inhibitorului de 0,5 g/l la o expunere în decurs de 72 şi 240 de ore, pierderile corozive se micşorează de 6 şi, respectiv, 5 ori. La concentraţia inhibitorului de 0,05 g/l la o expunere în decurs de 72 ore viteza coroziunii se micşorează de 4,1 ori, iar la concentraţia de 0,75 g/l cu aceeaşi durată de expunere coeficientul de frânare este de 5,5. The data on the influence of inhibitor concentration and exposure time on the corrosion rate k1, g/m2·24 hours and the braking coefficient γ are indicated in the table. From these data it can be seen that the greatest effect is achieved when using the inhibitor (sodium pyruvate) in a concentration of 0.05...0.75 g/l. Thus, at the concentration of the inhibitor of 0.5 g/l at an exposure within 72 and 240 hours, the corrosive losses decrease by 6 and 5 times, respectively. At the inhibitor concentration of 0.05 g/l during an exposure within 72 hours, the corrosion rate decreases by 4.1 times, and at the concentration of 0.75 g/l with the same exposure time, the braking coefficient is 5, 5.
Trebuie de remarcat faptul că coeficientul de frânare la utilizarea piruvatului de sodiu variază mai puţin în funcţie de durata procedeului decât la utilizarea aminoguanizonei acidului piruvic şi, prin urmare, suprimarea coroziunii este mult mai stabilă. It should be noted that the inhibition coefficient when using sodium pyruvate varies less depending on the duration of the process than when using pyruvic acid aminoguanisone and therefore the corrosion suppression is much more stable.
Cantitatea de inhibitor adăugat în mediul coroziv joacă un rol important. Limita minimă este concentraţia de 0,05 g/1, deoarece la o concentraţie mai mică introducerea lui în mediul coroziv reduce neînsemnat pierderile corozive. Ca limită maximă se consideră concentraţia inhibitorului de 1,0 g/1, deoarece la mărirea concentraţiei peste 1,0 g/l pierderile corozive nu se schimbă semnificativ, însă creşterea concentraţiei inhibitorului sporeşte cheltuielile. The amount of inhibitor added to the corrosive medium plays an important role. The minimum limit is the concentration of 0.05 g/1, because at a lower concentration, its introduction into the corrosive environment insignificantly reduces the corrosive losses. The inhibitor concentration of 1.0 g/1 is considered as the maximum limit, because when the concentration increases above 1.0 g/l, the corrosive losses do not change significantly, but the increase in the inhibitor concentration increases the expenses.
Tabel Table
Influenţa concentraţiei piruvatului de sodiu şi a timpului de expunere asupra parametrilor procesului de coroziune a oţelului “Ст. 3” în apă The influence of sodium pyruvate concentration and exposure time on the parameters of the steel corrosion process "St. 3” in water
Concentraţia inhibitorului, g/l Timpul de expunere, τ, ore Viteza de coroziune k1, g/m2·24 ore Coeficientul de frânare, γ 0,05 8 24 72 240 5,9 3,0 1,6 1,1 3,6 4,0 4,1 3,6 0,1 8 24 72 240 5,5 2,5 1,3 0,9 3,8 4,8 5,0 4,3 0,25 8 24 72 240 4,9 2,2 1,2 0,9 4,3 5,5 5,5 4,4 0,5 8 24 72 240 4,5 3,0 1,1 0,8 4,7 4,0 6,0 5,0 0,75 8 24 72 240 4,8 3,2 1,2 1,0 4,4 3,8 5,5 4,0 1,0 8 24 72 240 4,85 3,24 1,27 1,05 4,3 3,7 5,2 3,8 Inhibitor concentration, g/l Exposure time, τ, hours Corrosion rate k1, g/m2·24 hours Braking coefficient, γ 0.05 8 24 72 240 5.9 3.0 1.6 1.1 3, 6 4.0 4.1 3.6 0.1 8 24 72 240 5.5 2.5 1.3 0.9 3.8 4.8 5.0 4.3 0.25 8 24 72 240 4, 9 2.2 1.2 0.9 4.3 5.5 5.5 4.4 0.5 8 24 72 240 4.5 3.0 1.1 0.8 4.7 4.0 6.0 5.0 0.75 8 24 72 240 4.8 3.2 1.2 1.0 4.4 3.8 5.5 4.0 1.0 8 24 72 240 4.85 3.24 1.27 1.05 4.3 3.7 5.2 3.8
Astfel, este propusă aplicarea unui inhibitor de coroziune a oţelului în apă eficient şi ecologic, care permite de a reduce în mod semnificativ pierderile corozive. Thus, it is proposed to apply an effective and environmentally friendly steel corrosion inhibitor in water, which allows to significantly reduce corrosive losses.
1. MD 441 Y 2011.11.30 1. MD 441 Y 2011.11.30
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MDA20120047A MD4245C1 (en) | 2012-04-19 | 2012-04-19 | Inhibitor of steel corrosion in water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MDA20120047A MD4245C1 (en) | 2012-04-19 | 2012-04-19 | Inhibitor of steel corrosion in water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| MD4245B1 MD4245B1 (en) | 2013-07-31 |
| MD4245C1 true MD4245C1 (en) | 2014-02-28 |
Family
ID=48875333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| MDA20120047A MD4245C1 (en) | 2012-04-19 | 2012-04-19 | Inhibitor of steel corrosion in water |
Country Status (1)
| Country | Link |
|---|---|
| MD (1) | MD4245C1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MD4321C1 (en) * | 2014-01-21 | 2015-09-30 | Институт Химии Академии Наук Молдовы | Inhibitor of steel corrosion in water |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0144663A1 (en) * | 1983-10-27 | 1985-06-19 | Henkel Kommanditgesellschaft auf Aktien | Use of corrosion inhibitors in aqueous systems |
| EP0619290A2 (en) * | 1993-04-07 | 1994-10-12 | Ciba-Geigy Ag | Salts of alkaline earth metals and transition metals as well as complexes of transition metals of ketocarboxylic acids and their use as corrosion inhibitors |
| GB2279344A (en) * | 1993-06-25 | 1995-01-04 | Ciba Geigy Ag | Carrier-bound ketocarboxylic acids as corrosion inhibitors |
| MD3258F1 (en) * | 2006-07-19 | 2007-02-28 | Institutul De Fizica Aplicata Al Academiei De Stiinte A Moldovei | Inhibitor of steel corrosion in the water |
| MD3348F1 (en) * | 2006-11-30 | 2007-06-30 | Institutul De Fizica Aplicata Al Academiei De Stiinte A Moldovei | Inhibitor of steel corrosion in the water |
| MD3867F1 (en) * | 2008-08-08 | 2009-03-31 | Institutul De Fizica Aplicata Al Academiei De Stiinte A Moldovei | Use of aqueous extract of horse-chestnut fruits as steel corrosion inhibitor in water |
| MD243Y (en) * | 2009-12-17 | 2010-07-30 | Institutul De Fizica Aplicata Al Academiei De Stiinte A Moldovei | Inhibitor of steel corrosion in water |
| MD307Y (en) * | 2010-04-27 | 2010-12-31 | Institutul De Fizica Aplicata Al Academiei De Stiinte A Moldovei | Inhibitor of steel corrosion in the water |
| MD359Y (en) * | 2010-07-23 | 2011-04-30 | Inst De Chimie Al Academiei De Stiinte A Moldovei | Inhibitor of steel corrosion in water |
| MD441Y (en) * | 2011-02-18 | 2011-11-30 | Inst De Chimie Al Academiei De Stiinte A Moldovei | Inhibitor of steel corrosion in water |
| WO2011159764A1 (en) * | 2010-06-15 | 2011-12-22 | Champion Technologies, Inc. | Inhibiting stress corrosion cracking of metal exposed to moderate to high concentrations of ethanol |
-
2012
- 2012-04-19 MD MDA20120047A patent/MD4245C1/en not_active IP Right Cessation
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0144663A1 (en) * | 1983-10-27 | 1985-06-19 | Henkel Kommanditgesellschaft auf Aktien | Use of corrosion inhibitors in aqueous systems |
| EP0619290A2 (en) * | 1993-04-07 | 1994-10-12 | Ciba-Geigy Ag | Salts of alkaline earth metals and transition metals as well as complexes of transition metals of ketocarboxylic acids and their use as corrosion inhibitors |
| GB2279344A (en) * | 1993-06-25 | 1995-01-04 | Ciba Geigy Ag | Carrier-bound ketocarboxylic acids as corrosion inhibitors |
| MD3258F1 (en) * | 2006-07-19 | 2007-02-28 | Institutul De Fizica Aplicata Al Academiei De Stiinte A Moldovei | Inhibitor of steel corrosion in the water |
| MD3348F1 (en) * | 2006-11-30 | 2007-06-30 | Institutul De Fizica Aplicata Al Academiei De Stiinte A Moldovei | Inhibitor of steel corrosion in the water |
| MD3867F1 (en) * | 2008-08-08 | 2009-03-31 | Institutul De Fizica Aplicata Al Academiei De Stiinte A Moldovei | Use of aqueous extract of horse-chestnut fruits as steel corrosion inhibitor in water |
| MD243Y (en) * | 2009-12-17 | 2010-07-30 | Institutul De Fizica Aplicata Al Academiei De Stiinte A Moldovei | Inhibitor of steel corrosion in water |
| MD307Y (en) * | 2010-04-27 | 2010-12-31 | Institutul De Fizica Aplicata Al Academiei De Stiinte A Moldovei | Inhibitor of steel corrosion in the water |
| WO2011159764A1 (en) * | 2010-06-15 | 2011-12-22 | Champion Technologies, Inc. | Inhibiting stress corrosion cracking of metal exposed to moderate to high concentrations of ethanol |
| MD359Y (en) * | 2010-07-23 | 2011-04-30 | Inst De Chimie Al Academiei De Stiinte A Moldovei | Inhibitor of steel corrosion in water |
| MD441Y (en) * | 2011-02-18 | 2011-11-30 | Inst De Chimie Al Academiei De Stiinte A Moldovei | Inhibitor of steel corrosion in water |
Also Published As
| Publication number | Publication date |
|---|---|
| MD4245B1 (en) | 2013-07-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Liu et al. | Corrosion inhibition and anti-bacterial efficacy of benzalkonium chloride in artificial CO2-saturated oilfield produced water | |
| Wen et al. | Corrosion behaviors of Mg and its alloys with different Al contents in a modified simulated body fluid | |
| Liu et al. | The corrosion of two aluminium sacrificial anode alloys in SRB-containing sea mud | |
| MY161119A (en) | Steel sheet for container and method of manufacturing the same | |
| Umoren et al. | Studies on the inhibitive effect of exudate gum from Dacroydes edulis on the acid corrosion of aluminium | |
| MX2009006256A (en) | Corrosion inhibitor intensifier compositions and associated methods. | |
| MX347341B (en) | Water purification unit. | |
| CN103864232B (en) | General corrosion and scale inhibitor for purifying circulating water and preparation and application thereof | |
| Liu et al. | Effect of Cu addition to AISI 8630 steel on the resistance to microbial corrosion | |
| CN101988201B (en) | Oligochitosan carbon steel seawater corrosion inhibitor and application thereof | |
| MD4245C1 (en) | Inhibitor of steel corrosion in water | |
| Loto et al. | Inhibition effect of 2-amino-5-ethyl-1, 3, 4-thiadiazole on corrosion behaviour of austenitic stainless steel type 304 in dilute HCl solution | |
| FR2981367B1 (en) | PROCESS FOR THE ANTICORROSIVE TREATMENT OF A SOLID METAL SUBSTRATE AND METALLIC SUBSTRATE WHICH CAN BE OBTAINED BY SUCH A METHOD | |
| WO2008078532A1 (en) | Steam condensate treating agent | |
| CN103643237B (en) | hydrochloric acid composite corrosion inhibitor | |
| TW200640804A (en) | Water treating agent and water treatment method | |
| MD359Y (en) | Inhibitor of steel corrosion in water | |
| CN105399222A (en) | Sterilizing corrosion inhibitor for treating circulation cooling water, and preparation method thereof | |
| MD441Z (en) | Inhibitor of steel corrosion in water | |
| Hermoso-Diaz et al. | A study of Salvia hispanica as green corrosion inhibitor for carbon steel in sulfuric acid | |
| MD4310C1 (en) | Inhibitor of steel corrosion in water | |
| MD307Y (en) | Inhibitor of steel corrosion in the water | |
| Oreko et al. | Assessment of Inhibitive Drugs for Corrosion Inhibition Applications in Petrochemical Plants–A Review | |
| CN100371499C (en) | Preparation method of composite corrosion inhibitor for copper-nickel alloy in seawater | |
| Asra Awizar et al. | The performance of nanosilicate from rice husk ash as green corrosion inhibitor for carbon steel in 0.5 M HCl |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG4A | Patent for invention issued | ||
| KA4A | Patent for invention lapsed due to non-payment of fees (with right of restoration) | ||
| MM4A | Patent for invention definitely lapsed due to non-payment of fees |