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Compound corrosion inhibitor of B10 copper-nickel alloy suitable for seawater medium and preparation method of compound corrosion inhibitor

A technology of copper-nickel alloy and corrosion inhibitor, which is applied in the field of corrosion and protection of metal materials, can solve the problems of complicated purification process, unfavorable industrial application, and low corrosion inhibition efficiency of linseed oil corrosion inhibitor, so as to improve solubility and dispersion performance, excellent corrosion inhibition effect

Inactive Publication Date: 2018-12-18
BINZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The synthesis of imidazoline corrosion inhibitors using linseed oil as raw material has been reported in the literature "Evaluation of Metal Surface Protective Coatings and Corrosion Inhibitor Technology Research" and patents 201410238332.3 and 201410238349.9, but the linseed oil reported in the literature or patent Corrosion agents are all aimed at the corrosion protection of steel in different media (acid, sewage, seawater), and the purification process is very complicated, and the corrosion inhibition efficiency of a single linseed oil corrosion inhibitor is not high, which is not conducive to industrial application

Method used

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  • Compound corrosion inhibitor of B10 copper-nickel alloy suitable for seawater medium and preparation method of compound corrosion inhibitor
  • Compound corrosion inhibitor of B10 copper-nickel alloy suitable for seawater medium and preparation method of compound corrosion inhibitor
  • Compound corrosion inhibitor of B10 copper-nickel alloy suitable for seawater medium and preparation method of compound corrosion inhibitor

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Embodiment 1

[0045] The present invention proposes a composite corrosion inhibitor suitable for B10 copper-nickel alloy in seawater corrosion medium and a preparation method thereof, which specifically includes the following steps:

[0046] Step 1: Preparation of benzotriazole linseed amide derivatives.

[0047]Dissolve linseed oil and triethylenetetramine in a 250 ml four-necked bottle in a molar ratio of 1:1 – 1:3 in xylene solvent, add 20 – 40 ml of xylene per mole of linseed oil, under nitrogen protection Slowly heat to 100-150°C, add concentrated sulfuric acid catalyst simultaneously, react at 100-150°C for 3-4 hours, the addition of said catalyst is to add 0.1-0.5 ml in every mole of linseed oil, and the reaction ends Afterwards the xylene was distilled off. After cooling down to room temperature, the product obtained is a linseed oil amide derivative.

[0048] Add linseed oil amide derivatives and benzotriazole sodium in a 250 ml four-necked bottle at a molar ratio of 1:1-1:1.05, ...

Embodiment 2

[0064] The main difference between this embodiment and embodiment 1 lies in step 2, specifically:

[0065] Mix benzotriazole linseed oil amide derivatives, sodium molybdate and isopropanol at mass fractions of 75%, 10% and 15% respectively to obtain a complex corrosion inhibitor.

[0066] Add the obtained compound corrosion inhibitor to every 100g of simulated seawater medium (test results of East China Sea seawater: distilled water+2.5% NaCl+0.2% CaCl2+0.6% MgCl2.6H20+0.5% Na2SO4+0.15% NaHC03+0.08%KCl) Add the specific gravity of 5 mg compound corrosion inhibitor into the simulated seawater corrosion solution, and place B10 copper-nickel alloy test pieces in the simulated seawater solution with and without the compound corrosion inhibitor, at room temperature 25°C After soaking for 24 hours, the surface morphology was observed, and the results were as follows: image 3 and Figure 4 As shown, when no corrosion inhibitor was added, the surface corrosion of B10 copper-nickel ...

Embodiment 3

[0068] The main difference between this embodiment and embodiment 1 lies in step 2, specifically:

[0069] Mix the benzotriazole linseed oil amide derivative, sodium molybdate and isopropanol according to their mass fractions of 70%, 15% and 15% respectively to obtain a composite corrosion inhibitor.

[0070] Add the obtained compound corrosion inhibitor to every 100g of simulated seawater medium (test results of East China Sea seawater: distilled water+2.5% NaCl+0.2% CaCl2+0.6% MgCl2.6H20+0.5% Na2SO4+0.15% NaHC03+0.08%KCl) Add the specific gravity of 10 mg compound corrosion inhibitor into the simulated seawater corrosion solution, and place B10 copper-nickel alloy test pieces in the simulated seawater solution with and without the compound corrosion inhibitor, at room temperature 25°C After soaking for 24 hours, the weight loss test was carried out. The results are shown in Table 2. After adding the corrosion inhibitor, the B10 copper-nickel alloy basically has no weight los...

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Abstract

The invention belongs to the field of metal material corrosion and protection, and relates to a compound corrosion inhibitor of a B10 copper-nickel alloy suitable for a seawater medium and a preparation method of the compound corrosion inhibitor. The compound corrosion inhibitor of the B10 copper-nickel alloy suitable for the seawater medium is composed of benzotriazole linseed oleamide derivatives, sodium molybdate and absolute ethyl alcohol. The compound corrosion inhibitor has the following advantages that on the one hand, the raw materials of the base, namely the benzotriazole linseed oleamide derivatives, of the corrosion inhibitor are wide in source, linseed oil is green vegetable oil, environment friendliness is achieved, a synthetic method is simple, and products do not need purification aftertreatment; and on the other hand, the base, namely the benzotriazole linseed oleamide derivatives, of the corrosion inhibitor has the independent excellent corrosion inhibition performanceto copper and nickel. Uniform corrosion and corrosive pitting of a B10 copper-nickel alloy material can be suppressed at the same time when the compound corrosion inhibitor is used by being compounded with other reagents again.

Description

technical field [0001] The invention belongs to the field of metal material corrosion and protection, and in particular relates to a B10 copper-nickel alloy composite corrosion inhibitor suitable for seawater corrosion medium and a preparation method thereof. Background technique [0002] The outstanding advantages of copper and its alloy B10 cupronickel are good electrical conductivity and thermal conductivity, which is second only to silver and occupies the second place among metals. It is widely used in chemical industry, electrical engineering, electric power, navigation, weapons and other military and civilian sectors. Heat exchange equipment, containers, valves, pumps, turbines, shafts and other machinery and components. However, in neutral medium, especially when there is Cl- attack, severe corrosion will occur. [0003] A corrosion inhibitor is a substance that can inhibit the destruction process of metals in corrosive media at very low concentrations. At present, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/14C23F11/18
CPCC23F11/149C23F11/185
Inventor 陈宇
Owner BINZHOU UNIV
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