Bureau of Indian Standards specifications for aluminium surface treatment. These are the controlling standards for anodizing and surface finishing on Indian fabricator projects, including BIS certification, government tenders, and Indian architectural specifications.
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The controlling Indian standard for anodic coatings on aluminium and its alloys, covering decorative and protective anodizing. Specifies coating-thickness grades AC 5, AC 10, AC 15, AC 20, AC 25 (thickness in micrometres), with sealing quality, abrasion resistance, light-fastness, and dimensional change requirements. Provides test method references (cross-linked to IS 5523 for thickness, sealing, and abrasion testing). Used for BIS certification of anodized architectural extrusions, consumer goods, and industrial components in India. The 4th revision aligned several provisions with ISO 7599.
Specifies aluminium-magnesium-silicon (6xxx series, primarily 6063 and equivalents) extruded sections for architectural applications in India. Covers chemical composition, mechanical properties, dimensional tolerances, and surface finish requirements for sections intended for subsequent anodizing or powder coating. Frequently referenced jointly with IS 1868 in Indian fenestration and façade tenders.
Companion test-methods standard to IS 1868. Defines laboratory procedures for measuring anodic coating thickness (gravimetric and microscopic), assessing seal quality (dye-stain absorption and admittance), abrasion resistance, mass per unit area, and light-fastness on dyed coatings. Reaffirmed periodically. Used as the reference test method in BIS-certification audits of Indian anodizing plants.
Indian specification for wrought aluminium and aluminium alloy bars, rods, and sections used in general engineering, including substrate stock for anodizing and surface finishing. Covers chemical composition, mechanical properties, and dimensional standards across a broader alloy range than IS 6411.