Vapor phase corrosion inhibitors and method for their production

A technology of corrosion inhibition, substances, applied in chemical instruments and methods, anti-corrosion coatings, other chemical processes, etc., can solve problems such as VCI corrosion protection damage

Inactive Publication Date: 2009-06-17
EXCOR KORROSIONSFORSCHUNG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the use of this packaging material in spaces with higher relative air humidity and, in the case of copper-based materials, damage to the corrosion protection of the VCI is not excluded

Method used

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  • Vapor phase corrosion inhibitors and method for their production
  • Vapor phase corrosion inhibitors and method for their production
  • Vapor phase corrosion inhibitors and method for their production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] The following material composition VCI (1) according to the present invention was prepared from a non-aqueous material:

[0072] 20.0% by weight caprylic acid

[0073] 15.0% by weight 2,4-hexadienoic acid

[0074] 15.0% by weight adipic acid

[0075] 10.0% by weight 2-aminobenzamide

[0076] 5.0% by weight 5,6-dimethylbenzimidazole

[0077] 35.0% by weight inert filler (silica gel)

[0078] In each case, 5 grams of this mixture was widely distributed on the bottom of a 25 ml glass beaker, which was placed in a glass bottle (capacity 1 liter). Position the second glass beaker containing 10 ml of deionized water next to the glass beaker. Then the sample holder is installed, and the 4 cleaned samples are respectively positioned on the sample holder at an inclination of 45° with respect to the horizontal. The sample is composed of low-alloy steel 100Cr6, cast iron GGG25, AlMg1SiCu and Cu-SF in each batch, and does not contain oxide color film and deposits.

[0079] The glass bo...

Embodiment 2

[0091] The following composition of matter according to the invention was prepared from a non-aqueous substance:

[0092] 25.0% by weight caprylic acid

[0093] 15.0% by weight 2,4-hexadienoic acid

[0094] 15.0% by weight adipic acid

[0095] 5.0% by weight methyl paraben

[0096] 15.0% by weight Niacinamide

[0097] 2.5% by weight 5,6-dimethylbenzimidazole

[0098] 21.5 wt% potassium hydroxide

[0099] 1.0% by weight 250GR (hydroxyethyl cellulose, dispersing aid, thickening agent) and thus a 25% dispersion prepared by adding deionized water.

[0100] Use this preparation to coat paper web (kraft paper 70g / m 2 ), which achieves 15g / m 2 Of wet application. The VCI paper VCI (2) according to the present invention thus manufactured was tested immediately after air drying its corrosion protection effect compared to the commercially available corrosion protection paper used as the reference system (R2). According to the chemical analysis, the reference system (R2) contains the active...

Embodiment 3

[0109] 12.7% by weight caprylic acid

[0110] 8.6 wt% pelargonic acid

[0111] 11.2% by weight sebacic acid

[0112] 11.2% by weight 4-aminobenzamide

[0113] 6.8% by weight methyl paraben

[0114]

[0115] 14.1% by weight sodium caprylate

[0116] 14.3% by weight silicic acid

[0117] 6.3% by weight silicate (anti-caking additive)

[0118] 8.1% by weight calcium carbonate

[0119] 6.7 wt% B 215 (stabilizer)

[0120] 26.5% by weight of this mixture was mixed with 73.5% by weight of EBA (ethylene / butyl acrylate copolymer) and processed into a VCI master batch. For this, a laboratory extrusion equipment Rheocord 90 (HAAKE) with a co-rotating twin screw extruder is used. The mixture was extruded at a screw speed of 65 to 80 rpm at a cylinder temperature of 110 to 135°C and a nozzle temperature of 135°C, and pelletized by cold cutting. The pelletized VCI masterbatch is further processed into VCI film by extrusion blown film molding. For this purpose, a laboratory extrusion equipmen...

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Abstract

The present invention relates to new substance combinations as vapor phase corrosion inhibitors for protecting a broad range of customary utility metals, including iron, chromium, nickel, tin, zinc, aluminum, copper, magnesium and their alloys, against corrosion in humid climates. Said substance combinations comprise (1) at least one C6 to C10 aliphatic monocarboxylic acid, (2) at least one C6 to C10 aliphatic dicarboxylic acid, and (3) a primary aromatic amide. Preferably they further comprise (4) an aliphatic ester of hydroxybenzoic acid, in particular of 4-hydroxybenzoic acid, and / or (5) a bemzimidazole, in particular a benzimidazole substituted on the benzene ring.

Description

Technical field [0001] The present invention relates to a material composition as a vapor phase corrosion inhibitor (corrosion inhibitor that can be vaporized or sublimated, vapor phase corrosion inhibitor VPCI, volatile corrosion inhibitor VCI), which is used to prevent common practical metals such as iron, chromium, Nickel, tin, zinc, aluminum, copper, magnesium and their alloys corrode in humid climates. Background technique [0002] Corrosion inhibitors have been used for decades, which tend to evaporate or sublime even under standard conditions and therefore reach the metal surface to be protected via the gas phase, for use in enclosed spaces, such as in packaging, switch cabinets or display cases Temporary corrosion protection for metal objects inside. In this way, preventing metal parts from corrosion during storage and transportation is a cleaner alternative to temporary corrosion protection with oil, grease or wax, and is more meaningful as the globalization of the natio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/02
CPCB32B27/18C23F11/02B65B55/19B65D81/26C09D5/08C23F11/126C23F11/149C23F11/187C09K2105/00
Inventor G·赖因哈德U·路德维希G·哈恩
Owner EXCOR KORROSIONSFORSCHUNG
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