FIELD: metallurgy, in particular corrosion protection of metals.
SUBSTANCE: invention relates to nitrate salt corrosion protection of metals and useful in manufacturing and conveyance of chemical fertilizers, e.g. ammonia saltpeter or its mixed composition with carbamide. Claimed inhibitor contains (mass.%) polyamine 10-40, formaldehyde 0.01-4, ammonia 0.01-3.5, and balance water. As polyamide preferably product of general formula H2[HNCH2NHCH2]nNCON[CH2NHCH2NH]mH2, where n and m = 1 or 2, is used. Present inhibitor has unlimited solubility in water and concentration in fertilizer solution of 0.01-3 mass.%.
EFFECT: high effective nitrate corrosion inhibitor for carbon steel.
2 cl, 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| FORMALDEHYDE CORROSION INHIBITOR FOR CARBON STEELS | 2003 |
|
RU2231574C1 |
| METHOD OF IMPROVING SERVICE PERFORMANCE OF LIQUID UREA AND AMMONIUM NITRATE-BASED FERTILIZER | 1996 |
|
RU2116992C1 |
| LIQUID FERTILIZER BASED ON CARBAMIDE AND AMMONIUM NITRATE AND A METHOD FOR PRODUCTION THEREOF | 2020 |
|
RU2740209C1 |
| METHOD OF PREPARATION OF LIQUID NITROGEN FERTILIZERS | 1994 |
|
RU2090539C1 |
| CORROSION INHIBITOR | 2022 |
|
RU2804360C1 |
| METHOD FOR PURIFICATION OF NITROGEN FERTILIZERS IN LIQUID PHASE AGAINST PETROLEUM OILS | 1996 |
|
RU2111936C1 |
| CARBON STEEL RESERVOIR FOR STORING LIQUID NITROGEN FERTILIZERS | 1994 |
|
RU2095300C1 |
| METHOD OF PRODUCING LIQUID FERTILIZER AT DECREASED AMMONIUM CONTENT | 1994 |
|
RU2114092C1 |
| METHOD FOR PREPARING POLYAMINE | 2002 |
|
RU2228925C2 |
| METHOD OF DETERMINATION OF COMPOSITION INDEX OF MIXED CARBAMIDE AND AMMONIUM NITRATE WATER SOLUTION | 1996 |
|
RU2110782C1 |
