Publication

Fabrication of an anode with enhanced durability

Christos Comninellis
1997
Patents

Abstract

A dimensionally stable anode with enhanced durability for use in electrochem. processes (e.g. those involving evolution of Cl2 or O2) is described. The anode consists of a substrate of >=1 metals or metal oxides provided with an outer Ta surface coated with an electrocatalytic IrO2 coating. It has a std. lifetime >14 h-m2/g (preferably >25 h-m2/g). The substrate can be Ti, Ti alloy, Ta or stainless steel 316 and the coating may consist of Ta2O5 and IrO2. [on SciFinder (R)]

Official source

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Christos Comninellis
1997
Patents

Abstract

Official source

Related concepts (32)

Anodizing

Anodizing is an electrolytic passivation process used to increase the thickness of the natural oxide layer on the surface of metal parts. The process is called anodizing because the part to be treated forms the anode electrode of an electrolytic cell. Anodizing increases resistance to corrosion and wear, and provides better adhesion for paint primers and glues than bare metal does. Anodic films can also be used for several cosmetic effects, either with thick porous coatings that can absorb dyes or with thin transparent coatings that add reflected light wave interference effects.

Electrode

An electrode is an electrical conductor used to make contact with a nonmetallic part of a circuit (e.g. a semiconductor, an electrolyte, a vacuum or air). Electrodes are essential parts of batteries that can consist of a variety of materials depending on the type of battery. The electrophore, invented by Johan Wilcke, was an early version of an electrode used to study static electricity. Electrodes are an essential part of any battery. The first electrochemical battery made was devised by Alessandro Volta and was aptly named the Voltaic cell.

Cathodic protection

Cathodic protection (CP; kaeˈTQdIk) is a technique used to control the corrosion of a metal surface by making it the cathode of an electrochemical cell. A simple method of protection connects the metal to be protected to a more easily corroded "sacrificial metal" to act as the anode. The sacrificial metal then corrodes instead of the protected metal. For structures such as long pipelines, where passive galvanic cathodic protection is not adequate, an external DC electrical power source is used to provide sufficient current.

Related publications (8)

Thermodynamics of Electrolytic Corrosion

Dieter Landolt

The sections in this article are

Introduction
Fundamentals of Thermodynamics
Thermodynamics of Electrochemical Reactions
    Example 1
    Example 2
    Example 3
Nernst Equation
    Example 3
Cathodic Reactions in Corrosion
Pourbaix Diagrams
    Pourbaix Diagram for Water
    Pourbaix Diagram for Metals
    Example: Pourbaix Diagram for Fe
    Comments on Pourbaix Diagrams
Thermodynamics of High Temperature Corrosion

Wiley2007

Fabrication of an anode with enhanced durability

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Thermodynamics of Electrolytic Corrosion