Method of evaluating hole sealing quality of anodic oxide film

An anodic oxidation film and anodic oxidation technology, applied in the direction of removing certain components and weighing, can solve the problems of poor correlation of phosphoric chromic acid method, shorten the test soaking time, reduce the amount of corrosion, etc., and achieve the effect of good correlation

Active Publication Date: 2018-12-07
GUANGDONG XINGFA ALUMINUM
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Relatively mature methods include pre-soaking phosphochromic acid method with (without) nitric acid and pre-soaking phosphoric acid with (without) nitric acid, which are recorded in international standards ISO3210:2010, GB/T8753.1-2017 and GB/T8013.1-2018. method, with (without) nitric acid pre-soaked phosphomolybdic acid method, there are six methods in total, but these methods still have certain limitations from the perspective of environmental protection, or from the accuracy of the test, and are not the best method
[0004] Pre-soaking phosphochromic acid with (without) nitric acid is a traditional method, in which the reagent chromium trioxide contains hexavalent chromium, which is extremely toxic, which is not conducive to the occupational health and safety requirements of operators, and is also harmful to the environment great
[0005] Pre-soaking phosphoric acid with (without) nitric acid is based on the traditional method of phosphoric chromic acid, simply removes the poisonous and corrosion-inhibiting agent chromium trioxide, so the corrosion solution only contains phosphoric acid as a corrosion agent, less

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method of evaluating hole sealing quality of anodic oxide film
  • Method of evaluating hole sealing quality of anodic oxide film
  • Method of evaluating hole sealing quality of anodic oxide film

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0050] Example 1

[0051] This embodiment provides a method for evaluating the sealing quality of anodized films. The profiles evaluated in this embodiment include: X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, and also include For the profiles blank 1# and blank 2# treated with anodization (including sealing), the concentration of magnesium sulfate used in preparing the phosphate magnesium acid solution is 20g / L, and the evaluation method is achieved through the following steps:

[0052] Step 1: measure the anodic oxidation area of ​​the sample, measure the size of the sample with a vernier caliper, and calculate the anodic oxidation area A of the sample (retain 2 decimal places).

[0053] Step 2: Degreasing, at room temperature, wipe the sample in absolute ethanol to degrease.

[0054] Step 3: Dry, the sample is air-dried (pre-dried) at room temperature for 5 minutes, then placed upright in a preheated drying oven at 60°C for 15 minutes, and then placed on the silica gel in a se...

Example Embodiment

[0074] Example 2

[0075] This embodiment provides a method for evaluating the sealing quality of anodized films. The samples evaluated in this embodiment are the same as those in Example 1. The concentration of magnesium sulfate used in preparing the magnesium phosphate solution is 20 g / L. The method is achieved through the following steps:

[0076] Step 1 to Step 4 are in accordance with the method in Example 1.

[0077] Step 5: Phosphate-magnesium acid method, immerse the sample upright in the pre-heated magnesium phosphate solution for 15 minutes, and the test temperature is 38 °C; take out the sample from the experimental solution, first use tap water, and then use deionized water to wash; finally Immediately after drying according to step 3, weigh the sample mass (m 2 ), accurate to 0.1 mg; the result is calculated according to the calculation method in Example 1.

Example Embodiment

[0078] Example 3

[0079] This embodiment provides a method for evaluating the sealing quality of anodized films. The samples evaluated in this embodiment are the same as those in Example 1. The concentration of magnesium sulfate used in preparing the magnesium phosphate solution is 50 g / L. The method is achieved through the following steps:

[0080] Step 1 to Step 4 are in accordance with the method in Example 1.

[0081] Step 5: Phosphate-magnesium acid method, immerse the sample upright in the pre-heated phosphate-magnesium acid solution, soak for 15 minutes, and the test temperature is 38°C; take out the sample from the experimental solution, first use tap water, and then wash it with deionized water; Finally, the weight of the sample is weighed immediately after drying according to step 3 (m 2 ), accurate to 0.1 mg; the result is calculated according to the calculation method in Example 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Densityaaaaaaaaaa
Login to view more

Abstract

The invention provides a method of evaluating the hole sealing quality of an anodic oxide film. The method comprises the following steps: measuring the anodic oxidation area of a test sample, degreasing, weighing, carrying out phosphorous magnesium acid process, and then calculating to obtain the weight loss per unit area of the test sample. The method for evaluating the hole sealing quality of the anodic oxide film is an environmentally friendly method of testing the hole sealing quality of anodic oxide films of aluminum and aluminum alloy, and has a strong correlation with a phosphoric chromium acid method which is a conventional test method.

Description

technical field [0001] The invention relates to a method for evaluating the sealing quality of an anodized film, which belongs to the field of nonferrous metal processing. Background technique [0002] The sealing quality of anodized film is an important indicator of the corrosion resistance of aluminum and aluminum alloy anodized film, which can reflect the quality level and service life of the product while inspecting the quality level of the production process. Before 2010, domestic and foreign have been using (without) nitric acid pre-soaked phosphochromic acid method (hereinafter referred to as phosphochromic acid method) for testing. Since 2010, with the continuous strengthening of domestic and foreign awareness of environmental protection, the application of heavy metals, especially the highly toxic hexavalent chromium, has been restricted. The reagent chromium trioxide used in the phosphochromic acid method contains hexavalent chromium. Hexavalent chromium is easily...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01N5/04
CPCG01N5/04
Inventor 夏秀群梁金鹏张娟
Owner GUANGDONG XINGFA ALUMINUM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap