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Cobaltocene cationic-based corrosion inhibitor as well as preparation method and application method

A cobaltocene-based cation and cation-based technology, which is applied to cobaltocene-based cation-based corrosion inhibitors and their preparation. Using cobaltocene-based cation-based compounds as hydrochloric acid corrosion inhibitors can solve the problem of high toxicity of inorganic corrosion inhibitors and water richness. Nutritization, not suitable for environmental protection and other problems, to achieve the effect of wide application temperature range, slow down corrosion, and wide application range

Active Publication Date: 2019-12-13
NORTHWESTERN POLYTECHNICAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, inorganic corrosion inhibitors are highly toxic, and phosphate can also cause eutrophication of water bodies; compared with inorganic corrosion inhibitors, organic corrosion inhibitors are used in less amounts and have better effects, but most of them are poor in water solubility and have certain toxic side effects. Does not meet the requirements of environmental protection

Method used

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  • Cobaltocene cationic-based corrosion inhibitor as well as preparation method and application method
  • Cobaltocene cationic-based corrosion inhibitor as well as preparation method and application method
  • Cobaltocene cationic-based corrosion inhibitor as well as preparation method and application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Swell 2.0g of IRA-400(Cl) resin with water for 1-5h; dissolve 0.2g of cobaltocene hexafluorophosphate in 3-5mL of acetone to obtain solution A; pretreated IRA-400(Cl) ) resin was dissolved in 1 to 3 mL of deionized water; solution A was added dropwise and stirred at room temperature for 1 to 2 hours, the filtrate was collected by filtration, and the resin was washed with hot water for several times and combined with the filtrate; the concentrated solution was freeze-dried to obtain 81% of Ι -1 product.

[0048]The effect diagram of this embodiment:

[0049] figure 2 It is the Fourier transform infrared spectrum before and after ion exchange of the cobaltocene-based corrosion inhibitor. Among them in 838cm -1 The disappearance of the P-F peak indicates that the cobaltocene-based corrosion inhibitor was successfully prepared.

[0050] image 3 It is a digital photo before and after ion exchange of the cobaltocene-based corrosion inhibitor.

[0051] Figure 4 It is...

Embodiment 2

[0054] The concentration of the hydrochloric acid solution is 4.0mol / L, the dosage of the hydrochloric acid solution is 150mL, and the cobaltocene-based corrosion inhibitor (R=-C 16 h 33 ) is 20mg / L, and 10# steel and 304 stainless steel are immersed in the acid solution for 2 hours at 25°C. The corrosion inhibition efficiencies (η) measured under these conditions are 88% and 70%, respectively.

Embodiment 3

[0056] The concentration of the hydrochloric acid solution is 4.0mol / L, the dosage of the hydrochloric acid solution is 150mL, and the cobaltocene-based corrosion inhibitor (R=-C 16 h 33 ) is 20mg / L, and 10# steel and 304 stainless steel are immersed in the acid solution for 4 hours at 25°C. The corrosion inhibition efficiencies (η) measured under these conditions are 95% and 79%, respectively.

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Abstract

The invention relates to a cobaltocene cationic-based corrosion inhibitor as well as a preparation method and an application method. Tricyclazole is taken as a linking group, a novel cobaltocene cationic-based corrosion inhibitor prepared by introducing alkyl chains with different lengths on a cobaltocene cation, the preparation of the corrosion inhibitor utilizes ion exchange resin to carry out anionic replacement, the reaction is simple and efficient, the critical micelle concentration (cmc) of the cobaltocene cationic-based corrosion inhibitor is obviously lower than that of a traditional quaternary ammonium type corrosion inhibitor, and compared with a currently common-used corrosion inhibitor, the structure of the corrosion inhibitor combines double characteristics of inorganic corrosion inhibitor and organic corrosion inhibitor. The cobaltocene cationic-based corrosion inhibitor as well as the preparation method and the application method not only can be applied to the surface acidification process of carbon steel and products of the carbon steel, but also can reduce the corrosion of hydrochloric acid on the steel products, and have the advantages of being less in use amount,high in efficiency, good in water solubility, wide in application range and the like.

Description

technical field [0001] The invention belongs to the technical field of corrosion inhibitors, and relates to a cobaltocene-based corrosion inhibitor, a preparation method and a use method, in particular to a technology of using a cobaltocene-based compound as a corrosion inhibitor for hydrochloric acid. It can effectively inhibit the corrosion of carbon steel products in hydrochloric acid solution. Background technique [0002] The corrosion of metals spreads all over the national economy and brings huge losses to the national economy. Some corrosion even caused catastrophic accidents, which not only consumed precious resources, but also polluted the environment, seriously affecting the development of society and science and technology. On July 16, 2010, a CNPC oil pipeline near Dalian Xingang caught fire and exploded. On August 17, 2017, a fire occurred in the feed oil pump of the 1.4 million tons / year heavy oil catalytic cracking unit of Dalian Petrochemical Company of Ch...

Claims

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Application Information

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IPC IPC(8): C23F11/14C07F17/02
CPCC07F17/02C23F11/149
Inventor 颜静闫毅张雪张军平钟丰璘
Owner NORTHWESTERN POLYTECHNICAL UNIV
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