defects anodizing

Defects of colorless anodizing of aluminum profiles are divided into four main types:
– A type 1 - Banding, associated with the pressing technology and quality ingots
– A type 2 -Poloschatost, associated with mechanical surface preparation before anodizing aluminum profiles, for example, grinding or polishing.
– A type 3 - Corrosion Defects – defects in anodizing aluminum profiles from the effects of various types of corrosion: friction, overall, alkaline, acid, galvanic, chloride.
– A type 4 – Heterogeneity appearance of anodized aluminum profiles, different from the "banding" and "corrosion defects".

Each defect has one or two "culprits" of their origin - caster, Extruders or anodirovschika. For each defect is important to know, which of the stages of production, he is born and in what clearly appears.

defects anodizing

Aluminum anodizing: the impact of extrusion

Introduction Features material microstructure aluminum profiles - aluminum alloys - very often cause inhomogeneity appearance of anodized surface.

defects anodizing

Anodizing aluminum: the role of the cast structure of the billet

Microstructure as a source of defects anodized profiles material microstructure features aluminum profiles - aluminum alloys - very often cause inhomogeneity

defects anodizing

Anodized aluminum strips

A well-known expert in aluminum anodizing A.W. Brace in his classic book "Defects anodic coating. Their causes and prevention ”[1] leads

defects anodizing

Anodizing defects: classification

Aluminum anodizing (anodic oxidation, anodic oxidation) is a unique electrolytic process, which is used to protect the surface of extruded aluminum corrosion, a

defects anodizing

Anodizing defects: “tinsel”, “prižog” and “loss of contact”

See. also Classification of defects in anodizing aluminum Galvanization (glitter) English term Spangle Reasons for the composition of the alkaline solution high zinc content in the aluminum alloy Manifestation

defects anodizing

Anodizing defects: heterogeneity from graphite, obezzhirivaniya, etching

Below are visible inhomogeneity defects anodized surface, connected with the violation of manufacturing technology of aluminum profiles at any stage. These

defects anodizing

Anodizing defects: rinsing corrosion and chloride

The cause of many defects in anodizing aluminum profiles anyway is corrosion. Corrosion in the washing English term Rinse water corrosion

defects anodizing

Anodizing defects: acid and alkaline corrosion

In aluminum anodization, including – aluminum profiles, frequent defects include such, caused by, anyway, is an

defects anodizing

Anodizing defects: storage and transportation conditions

See. Classification of defects in anodizing aluminum Different types of corrosion can occur at different stages of the production process: from the method and conditions of storage

defects anodizing

Anodizing defects: from polishing, brush, chemical segregation

For successful use of anodized aluminum, especially for decorative purposes, its surface should have a perfect appearance. Often, however, the quality of

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