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Corrosion inhibitor composition for magnesium or magnesium alloys

A corrosion inhibition, magnesium alloy technology, applied in anti-corrosion coatings, metal material coating processes, electrolytic coatings, etc., can solve problems such as difficult process settings, tarnishing of metals, and environmental hazards

Inactive Publication Date: 2018-07-17
HELMHOLTZ ZENT GEESTHACHT ZENT FUER MATERIAL UND KUESTENFORSCHUNG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process setup involved in chromate treatment presents difficulties, so a more convenient process for corrosion inhibition is desired
In addition, chromate treatment has the disadvantages that, when handled, the treatment process can discolor the metal surface and make the metal tarnish
In addition, chromium compounds are quite toxic and harmful to the environment

Method used

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  • Corrosion inhibitor composition for magnesium or magnesium alloys
  • Corrosion inhibitor composition for magnesium or magnesium alloys
  • Corrosion inhibitor composition for magnesium or magnesium alloys

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Embodiment Construction

[0021] Preferred embodiments of the present invention are further illustrated by the following non-limiting examples with reference to the following figures. figure 1 The magnesium materials used for the hydrogen evolution measurement shown in FIG. 8 are specifically listed in Table 1. Ingots of HP Mg 51, WE43, ZE41, E21, AZ31, AZ91 and AM50 were cut to give a surface area of ​​240 to 480 cm 2 / g bands. This is done to ensure that each part of the alloy used to test the different inhibitor solutions has the same chemical composition. Slabs (5.0 cm 2 / g) of commercial purity magnesium (CP Mg220) were tested.

[0022] Table 1: * Noble impurities found in materials used for hydrogen evolution testing.

[0023]

[0024] *Analyzed by spark emission spectroscopy

[0025] figure 1 Shows hydrogen evolution measurements (normalized values) during which CP Mg (commercially pure Mg containing Fe-220ppm) was immersed in 0.5% NaCl containing 0.05M salicylic acid (sodium salt), 5-s...

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Abstract

The present invention relates to novel corrosion inhibitor compositions for magnesium or magnesium alloys and to a process for inhibiting the corrosion of such metals using such compositions. The corrosion inhibitor composition comprises a compound comprising a carboxyl group preventing the re-deposition of noble impurities which significantly decreases the corrosion rate by complexing said nobleimpurities, e.g. iron, nickel and copper.

Description

field of invention [0001] The invention relates to a novel corrosion inhibitor composition for magnesium or magnesium alloy, and a process for using the composition to inhibit the corrosion of the metal. Background of the invention [0002] Magnesium is the lightest of all structural metals, weighing 35% less than aluminum and 78% less than steel. The lightweight properties, wide availability and machinability of magnesium alloys make them suitable for the production of automotive components, electrical products, aircraft components, etc. Usually, magnesium and magnesium alloys are mainly made into special-shaped products through die-casting, extrusion or rolling processes. However, the ratio of magnesium alloys used in automotive components, electrical products, aircraft components, etc. has traditionally been low. The reason for the limited use of magnesium alloys is related to the characteristics of this type of alloy itself: low creep and corrosion resistance. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/12C09D5/08C25D11/24C23C22/46C23C22/57C23C22/68C23C22/83
CPCC23F11/12C23C22/57C23C22/68C23C22/83C09D5/086C25D11/026C25D11/30C23F11/124C23C22/78
Inventor 斯维亚兰纳·兰玛卡丹尼尔·赫希卡斯滕·布拉维特米哈伊尔·哲鲁克维奇
Owner HELMHOLTZ ZENT GEESTHACHT ZENT FUER MATERIAL UND KUESTENFORSCHUNG
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