Alkali-free non-nitrite concrete reinforcement antirust

A technology of concrete reinforcement and nitrite, applied in the field of reinforcement rust inhibitor, can solve problems such as accelerating reinforcement corrosion, and achieve the effects of inhibiting reinforcement corrosion and inhibiting anodic and cathodic reactions.

Active Publication Date: 2009-04-15
NANJING RUIDI HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, on the one hand, due to its toxicity and carcinogens, its use has been banned in European countries such as Switzerland and Germany; on the other hand, it is an anodic corrosion inhibitor, which has the pote

Method used

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  • Alkali-free non-nitrite concrete reinforcement antirust
  • Alkali-free non-nitrite concrete reinforcement antirust
  • Alkali-free non-nitrite concrete reinforcement antirust

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0025] Example 1: A concrete steel bar rust inhibitor, the optimal combination weight percentage of each component is:

[0026] Zinc gluconate 5%, lithium silicate 30%, ammonium benzoate 15%, low molecular weight (alcohol) amines 20%, water 30%.

[0027] The test items and methods refer to "Reinforced Concrete Rust Inhibitor" (JT / T 537-2004).

Example Embodiment

[0028] Example 2: A concrete steel rust inhibitor, the weight percentage of each component is: zinc gluconate 3%, lithium silicate 35%, ammonium benzoate 10%, low molecular weight (alcohol) amines 25%, water 27% %.

[0029] The test items and methods refer to "Reinforced Concrete Rust Inhibitor" (JT / T 537-2004).

[0030] The technical performance of concrete after adding rust inhibitor is shown in Table 1.

[0031] It can be seen from Table 1 that the present invention has a certain water reducing effect, can significantly improve the 7d and 28d compressive strength of concrete; it has a certain retarding effect on concrete. Meet the requirements of the specification "Reinforced Concrete Rust Inhibitor" (JT / T 537-2004).

[0032] figure 1 with figure 2 The results of the constant current and potential-time curve analysis chart show that the present invention has no corrosion effect on steel bars.

[0033] Table 1 Concrete technical performance

[0034]

[0035] Note: The cement...

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Abstract

The invention discloses an alkali-free non-nitrite rust retardant agent for concrete steel bars, which consists of the components (according to weight percentage) as follows: 3-10 percent of zinc gluconate, 20-40 percent of lithium metasilicate, 10-20 percent of ammonium benzoate, 15-25 percent of low molecular weight (alcohol) amine and 20-40 percent of water. The rust retardant agent can obviously relieve damage to the steel bar passive films of chloride ions, has the advantages of environmental protection, alkali free, low usage, good suitability with cement and being capable of improving concrete property properly and the like, is a high-effictive rust retardant agent for concrete steel bars, and can be applied to steel bar concrete structures of water conservancy, railway, civil construction and the like.

Description

technical field [0001] The invention relates to a steel bar rust inhibitor, in particular to an alkali-free and non-nitrite concrete steel bar rust inhibitor. Background technique [0002] The two main causes of steel corrosion in concrete are carbonization and chloride ion attack. The survey shows that among all the causes of damage to concrete structures, steel bar corrosion damage is dominant, and the corrosion loss related to steel bar corrosion accounts for about 40% of the world's corrosion loss. [0003] At present, the existing reinforcement protection methods mainly include surface coating method, cathodic protection method, electrochemical desalination, re-alkalinization, and the use of rust inhibitors, etc., but studies have shown that the use of reinforcement rust inhibitors has the best economic effect. The rust inhibitors studied in the early stage mainly include sodium benzoate, various nitrites and chromates, etc., but some of these rust inhibitors have a si...

Claims

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Application Information

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IPC IPC(8): C04B24/12C04B24/10C04B22/08
Inventor 唐修生黄国泓祝烨然李克亮王冬陈国新徐辉王毅温金保蔡明邢有红刘兴荣
Owner NANJING RUIDI HIGH TECH
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