Acidic cleaner for carbon steel and applications

An acid cleaning agent and cleaning agent technology, applied in the field of acid cleaning agents for carbon steel, can solve problems such as toxic and side effects, eutrophication of water body, lack of market competitiveness, etc., achieve strong continuous action ability, low dosage, and good application prospects Effect

Inactive Publication Date: 2007-02-21
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Currently commonly used pickling corrosion inhibitors mainly include inorganic corrosion inhibitors containing toxic chromate and some organic phosphorus corrosion inhibitors, the discharge of which may cause eutrophication of water bodies
Most of the existing corrosion inhibitors in the same field have toxic and side effects and do not have market competitiveness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Take 100L of dilute hydrochloric acid with a concentration of 0.1M as the cleaning solution, then add 50g of ciprofloxacin, and immerse the carbon steel to be cleaned in the cleaning solution for 15 minutes at room temperature.

[0015] The highest corrosion inhibition efficiency obtained through experimental testing is 96%, which shows that it is an efficient cleaning agent.

Embodiment 2

[0017] Take 100L of dilute hydrochloric acid with a concentration of 0.2M as the cleaning solution, then add 70g ofloxacin, and immerse the carbon steel to be cleaned in the cleaning solution for 2 hours at room temperature.

[0018] The highest corrosion inhibition efficiency obtained through experimental testing is 97%, which shows that it is an efficient cleaning agent.

Embodiment 3

[0020] Take 100L of dilute hydrochloric acid with a concentration of 0.5M as the cleaning solution, then add 100g of norfloxacin, and immerse the carbon steel to be cleaned in the cleaning solution for 1 hour at room temperature.

[0021] The highest corrosion inhibition efficiency obtained through experimental testing is 97%, which shows that it is an efficient cleaning agent.

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PUM

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Abstract

This invention discloses an acidic detergent for carbon steel and its application. The acidic detergent is composed of xacin-series antibacterial drug and 0.1-2 M acid solution at a ratio of 0.010-5.0 kg / L. The acidic detergent can be applied by soaking carbon steel in the acidc detergent at room temperature for 15 min-3 h. The acidic detergent can prevent carbon steel from local or whole corrosion, and has such advantages as low usage amount, high corrosion-inhibiting efficiency, long effective time, no harm to the environment or creatures, etc., thus having good application potential.

Description

technical field [0001] The invention relates to the technical field of corrosion inhibitor production, in particular to an acid cleaning agent for carbon steel and its application for preventing unnecessary overall corrosion and local corrosion of carbon steel and its products in the pickling process. Background technique [0002] Carbon steel has good mechanical properties and process properties, and is cheap, so it is more and more widely used in various industries. In the process of product processing and application, dilute sulfuric acid or dilute hydrochloric acid is often used for pickling, which can remove the oxide film or corrosion products on the surface. In order to avoid excessive consumption of metal or acid during pickling and prevent harmful corrosion, acid Adding corrosion inhibitors is an effective means. [0003] Currently commonly used pickling corrosion inhibitors mainly include inorganic corrosion inhibitors containing toxic chromate and some organic ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/04
Inventor 李焰鞠虹张树芳马瑛
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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