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Controllable release halloysite loaded molybdate corrosion inhibitor and preparation method thereof

A technology of molybdate and corrosion inhibitor, which is applied in the field of corrosion inhibitors, can solve problems such as economic loss, resource and energy waste, and reduce material performance, and achieve the effect of prolonging the service life

Inactive Publication Date: 2019-12-24
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Corrosion of metal materials is an inevitable problem during use. Corrosion will reduce the performance of materials, waste resources and energy, lead to huge economic losses, and even major accidents (ZahidahKA, Kakooei S, Ismail MC, Raja PB ,Halloysite nanotubes as nanocontainer for smart coating application:Areview,[J]Prog.Org.Coat.2017,111:175-185)

Method used

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  • Controllable release halloysite loaded molybdate corrosion inhibitor and preparation method thereof
  • Controllable release halloysite loaded molybdate corrosion inhibitor and preparation method thereof
  • Controllable release halloysite loaded molybdate corrosion inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Na 2 MoO 4 2H 2 O (8.0 g) was dissolved in 100 ml of deionized water, and then 4 g of HNTs was added thereto to form a suspension, called A suspension.

[0026] (2) Transfer suspension A to a 100ml beaker, then place the beaker in a vacuum tank, and use a vacuum pump to evacuate to 1.325E3Pa (1.325×10 3 Pa, that is, 1325Pa), and maintain the pressure for 90 minutes, and then put the system back under normal pressure for 30 minutes, which is called the completion of a loading process. Repeating the above cycle process will complete 3 loading experiments.

[0027] (3) After 3 times of loading, the sample was centrifuged, washed and re-dispersed to 5.0wt% CaCl 2 Stir in the solution for 10min, finally centrifuge, wash, dry at 80°C for 24h, and then grind to obtain HNTs loaded molybdate and CaMoO 4 Encapsulated corrosion inhibitor materials (Ca-Na 2 MoO 4 -HNTs).

Embodiment 2

[0029] (1) Na 2 MoO 4 2H 2 O (10.0 g) was dissolved in 100 ml of deionized water, and then 8 g of HNTs was added thereto to form a suspension, called A suspension.

[0030] (2) Transfer the suspension A to a 100ml beaker, then place the beaker in a vacuum tank, and use a vacuum pump to evacuate to 1.325E3Pa, and maintain the pressure for 60min, then put the system back under normal pressure 120min is called completing a loading process. Repeating the above cycle process will complete 6 loading experiments.

[0031] (3) After 6 times of loading, the sample was centrifuged, washed and re-dispersed to 3.0wt% CaCl 2 Stir in the solution for 15min, finally centrifuge, wash, dry at 40°C for 24h, and then grind to obtain HNTs loaded molybdate and CaMoO 4 Encapsulated corrosion inhibitor materials (Ca-Na 2 MoO 4 -HNTs).

Embodiment 3

[0033] (1) Na 2 MoO 4 2H 2 O (15.0 g) was dissolved in 100 ml of deionized water, and then 6 g of HNTs was added thereto to form a suspension, called A suspension.

[0034] (2) Transfer the suspension A to a 100ml beaker, then place the beaker in a vacuum tank, and use a vacuum pump to evacuate to 1.325E3Pa, and maintain this pressure for 120min, then put the system back under normal pressure 30min is called the completion of a loading process. Repeating the above cycle process will complete 2 loading experiments.

[0035] (3) The samples after three loadings were centrifuged, washed and re-dispersed to 1.0wt% CaCl 2 Stir in the solution for 5min, finally centrifuge, wash, dry at 60°C for 24h, and then grind to obtain HNTs loaded molybdate and CaMoO 4 Encapsulated corrosion inhibitor materials (Ca-Na 2 MoO 4 -HNTs).

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Abstract

The invention discloses a controllable release halloysite loaded molybdate corrosion inhibitor and a preparation method of the controllable release halloysite loaded molybdate corrosion inhibitor. Themethod comprises the steps that molybdate is loaded into HNTs by a negative pressure method according to the nano container effect of HNTs, and an insoluble CaMoO4 complex is formed in a port of theHNTs through mutual interaction of Ca ions and MoO42- of a pipe orifice slow down the release speed of MoO42- in a pipe. Therefore, the service life of the corrosion inhibitor is prolonged through thecontrolled release behavior of the corrosion inhibitor, so that the corrosion inhibitor can be conveniently and effectively used for corrosion prevention of metal materials, and the effect of releasing the corrosion inhibitor for a long time is achieved.

Description

technical field [0001] The invention belongs to the technical field of corrosion inhibitors, and relates to a preparation method of a corrosion inhibitor for metal anticorrosion, in particular to controlled-release halloysite-loaded molybdate and a preparation method thereof. Background technique [0002] Due to their excellent mechanical properties and suitable processing properties, metal materials have been widely used in industries such as automobiles, ships, chemicals, aerospace and construction. Corrosion of metal materials is an inevitable problem during use. Corrosion will reduce the performance of materials, waste resources and energy, lead to huge economic losses, and even major accidents (ZahidahKA, Kakooei S, Ismail MC, Raja PB , Halloysite nanotubes as nanocontainer for smart coating application:Areview, [J]Prog.Org.Coat.2017,111:175-185). In order to slow down the corrosion of materials, people have taken many protective measures, mainly including the selectio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/18
CPCC23F11/185
Inventor 王吉会邢旭腾
Owner TIANJIN UNIV
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