Improving pitting corrosion resistance of aluminum by anodizing process
Creators
- 1. Government College Univ., Lahore (Pakistan). Dept. of Chemistry
- 2. Pakistan Council of Scientific and Industrial Research Labs., Lahore (Pakistan)
Description
Summary: Anodizing of aluminum was studied in sulphuric/citric/boric acid electrolyte system to improve pitting corrosion resistance. Maximum oxide film thickness was obtained using 5% sulphuric acid, 3% citric acid and 0.5% boric acid electrolyte composition. The corrosion resistance of aluminum sample was determined to find the effectiveness of oxide coating by potentiodynamic polarization test. The surface morphology of aluminum samples was investigated using scanning electron microscope (SEM) before and after corrosion test. It was found that the coated aluminum sample obtained by anodizing in sulphuric/citric/boric acid electrolyte system exhibited better pitting corrosion resistance with no significant difference in surface morphology. (author)
Additional details
Publishing Information
- Journal Title
- Journal of the Chemical Society of Pakistan
- Journal Volume
- 35
- Journal Issue
- 1
- Journal Page Range
- p. 72-76
- ISSN
- 0253-5106
INIS
- Country of Publication
- Pakistan
- Country of Input or Organization
- Pakistan
- INIS RN
- 44063124
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- ALUMINIUM ALLOYS; ANODIZATION; COATINGS; CORROSION PROTECTION; ELECTROLYTES; ELECTRON MICROSCOPY; PITTING CORROSION; POLARIZATION; SULFURIC ACID
- Descriptors DEC
- ALLOYS; CHEMICAL COATING; CHEMICAL REACTIONS; CORROSION; CORROSION PROTECTION; DEPOSITION; ELECTROCHEMICAL COATING; ELECTROLYSIS; HYDROGEN COMPOUNDS; INORGANIC ACIDS; INORGANIC COMPOUNDS; LYSIS; MICROSCOPY; OXYGEN COMPOUNDS; SULFUR COMPOUNDS; SURFACE COATING