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A kind of composite steel bar rust inhibitor and its application for marine environment

A steel bar rust inhibitor, marine environment technology, applied in the preparation of reinforced concrete, the field of composite steel bar rust inhibitor, can solve the problems of unfavorable environment, rapid decline of anti-rust effect, high concentration and high cost

Active Publication Date: 2021-08-20
SHANDONG TRANSPORT VOCATIONAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing rust inhibitors for steel bars mainly have the following deficiencies: (1) the short-term anti-rust effect is good in the marine environment, but the anti-rust effect decreases rapidly during long-term immersion; (2) has adverse effects on the environment; (3) Use concentration and high cost

Method used

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  • A kind of composite steel bar rust inhibitor and its application for marine environment

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Experimental program
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Effect test

Embodiment 1

[0044] Embodiment one: the rust inhibitor formula that adopts is:

[0045] Sodium molybdate: 100g m -3 ;

[0046] Sodium D-gluconate: 2g m -3 ;

[0047] Diethanolamine: 2L·m -3 ;

[0048] Sodium petroleum sulfonate: 1L m -3 ;

[0049] Water: 165kg·m -3 .

Embodiment 2

[0050] Embodiment two: the rust inhibitor formula that adopts is:

[0051] Sodium molybdate: 110g m -3 ;

[0052] Sodium D-gluconate: 1.5g m -3 ;

[0053] Diethanolamine: 2.5L m -3 ;

[0054] Sodium petroleum sulfonate: 1.5L m -3 ;

[0055] Water: 165kg·m -3 .

Embodiment 3

[0056] Embodiment three: the rust inhibitor formula that adopts is:

[0057] Sodium molybdate: 120g m -3 ;

[0058]Sodium D-gluconate: 1g m -3 ;

[0059] Diethanolamine: 3L·m -3 ;

[0060] Sodium petroleum sulfonate: 2L m -3 ;

[0061] Water: 165kg·m -3 .

[0062] The first step: according to the amount of concrete to be prepared, in cubic meters, calculate the required amount of sodium molybdate, D-sodium gluconate, diethanolamine and sodium petroleum sulfonate according to the above formula, weigh or measure Take the above four substances;

[0063] The second step: according to the amount of concrete to be prepared, calculate and measure the water that needs to be added to prepare the concrete according to the volume, first pour the above-mentioned weighed diethanolamine into the water, stir evenly; then add sodium petroleum sulfonate Pour into water and stir evenly; then pour sodium molybdate into water and stir until completely dissolved; finally pour sodium D-gl...

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Abstract

The invention discloses a composite steel bar rust inhibitor for marine environment and its application. The rust inhibitor contains the following components: sodium molybdate: 100-120g·m ‑3 ; Sodium D-gluconate: 1-2g m ‑3 ; Diethanolamine: 2‑3L m ‑3 ; Sodium petroleum sulfonate: 1‑2L m ‑3 ; The content of the above components is calculated with the amount of reinforced concrete to be prepared. The corrosion inhibition efficiency of the rust inhibitor disclosed in the present invention is always greater than 95%. The rust inhibitor has the advantages of long-term effect, good rust inhibition effect, easy-to-obtain material, environmental friendliness, low use concentration and cost, and is a promising Anti-corrosion agent for concrete and steel bars suitable for marine environments.

Description

technical field [0001] The invention relates to a steel bar rust inhibitor and its application, in particular to a composite steel bar rust inhibitor used in marine environments and its application in preparing reinforced concrete. Background technique [0002] Reinforced concrete is one of the most important construction materials today and has been widely used in various large-scale engineering facilities, such as bridges, houses and ports. In the normal environment, reinforced concrete structures have a long service life, but in the marine environment, because chloride ions in seawater penetrate into the concrete structure, they gather around the steel bars and destroy the passivation film of the steel bars, causing the steel bars to corrode. The corrosion products of steel bars have a large volume, which leads to cracking of concrete, which greatly accelerates the failure of concrete structures. Therefore, the key to improving the service life of reinforced concrete str...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/16C04B103/61
CPCC04B40/0039C04B2103/61C04B22/08C04B24/10C04B24/122C04B24/16
Inventor 崔磊辛小丽陈艳华
Owner SHANDONG TRANSPORT VOCATIONAL COLLEGE