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IS 15152:2002 is the Indian Standard (BIS) for anti-corrosion treatment for steel structures - code of practice. This code of practice outlines the requirements for the anti-corrosion treatment of steel structures. It details methods for surface preparation, selection of appropriate paint systems based on environmental corrosivity, procedures for paint application, and quality control through inspection and testing to ensure long-term durability.
Lays down the code of practice for various anti-corrosion treatment systems for steel structures using paints, coatings, and surface preparation.
Overview
Status
Current
Usage level
Frequently Used
Domain
Materials Science — Painting, Coatings and Surface Finishing
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! Surface preparation is the most critical factor for coating performance. Visual inspection against ISO 8501-1 comparators for Sa 2½ is essential before applying the primer.
! Always consult the paint manufacturer's technical data sheet for specific properties like pot life, overcoating intervals, and curing times, as they supersede the general guidance in this standard.
! Pay special attention to the DFT on edges, corners, and welds, as these areas are prone to premature failure and often require a stripe coat.
ISO 12944 series (specifically Parts 1-8)ISO (International Organization for Standardization), Global
HighCurrent
Paints and varnishes — Corrosion protection of steel structures by protective paint systems
Comprehensive standard covering corrosivity, design, surface prep, paint systems, and application.
AS/NZS 2312.1:2014Standards Australia / Standards New Zealand, Australia/New Zealand
HighCurrent
Guide to the protection of structural steel against atmospheric corrosion by the use of protective coatings - Part 1: Paint coatings
Provides guidance on selecting paint systems for various atmospheric corrosivity categories.
SSPC-PA 1SSPC (The Society for Protective Coatings) / AMPP, USA
MediumCurrent
Shop, Field, and Maintenance Painting of Steel
Focuses heavily on the practical application, inspection, and quality control of paint work.
BS 5493:1977BSI (British Standards Institution), UK
HighWithdrawn
Code of practice for protective coating of iron and steel structures against corrosion
The historical British predecessor to ISO 12944, with a very similar scope and intent to IS 15152.
Key Differences
≠IS 15152 uses descriptive environmental categories (Rural, Urban, Industrial, Marine), whereas ISO 12944 uses a more quantitative corrosivity classification system (C1 to C5, CX) based on measured metal loss.
≠ISO 12944 explicitly defines 'durability' in time ranges (Low, Medium, High, Very High) to first major maintenance, a concept not quantitatively defined in IS 15152.
≠International standards like SSPC-PA 2 provide statistically rigorous rules for DFT measurement frequency and acceptance criteria, which are more detailed than the general guidance in IS 15152.
≠IS 15152 is a single document, while the equivalent ISO 12944 is a multi-part series (9 parts) that separates topics like design, environment classification, lab testing, and offshore structures into dedicated documents.
Key Similarities
≈All standards are founded on the principle of using a multi-coat barrier paint system over a properly prepared steel substrate for corrosion protection.
≈A strong emphasis is placed on thorough surface preparation as a critical prerequisite for coating performance, with near-identical blast cleaning grades (e.g., Sa 2½) referenced across the standards.
≈The fundamental types of paint systems recommended (e.g., epoxy, polyurethane, zinc-rich) are common to both IS 15152 and international standards for similar applications.
≈All standards advocate for quality control and inspection at all stages, including checks for surface cleanliness, surface profile, film thickness, and absence of defects.
Parameter Comparison
Parameter
IS Value
International
Source
Standard Blast Cleaning Grade (High Performance)
Sa 2½ (Very thorough blast cleaning) as per IS 9954
Sa 2½ (Very thorough blast cleaning) as per ISO 8501-1
ISO 12944-4
Soluble Salt Contamination Limit
Not quantitatively specified; states surface should be 'free from detrimental amounts'.
Typically ≤ 30-50 mg/m² of chloride, measured via the Bresle method (ISO 8502-9).
SSPC-Guide 15 / ISO 8502-9
Typical Surface Profile (Anchor Pattern)
Generally 25-40 µm, varies by primer type.
Generally 50-85 µm for high-build epoxy/zinc systems.
NACE SP0178 / Paint Manufacturer's Data
DFT Measurement Frequency Rule
General guidance to take a 'sufficient number of readings'.
Statistically defined: 5 spot measurements per 100 m² area, with specific acceptance rules (the 80/20 rule).
SSPC-PA 2
Example Total DFT (Industrial/Marine)
200-245 µm (e.g., System No. 6: Epoxy-Epoxy MIO-Epoxy)
Typically 240-360 µm for a C5 High durability system (e.g., System A5M.05).
What surface preparation is needed for a coastal (C5-M) environment?+
Blast cleaning to Sa 2½ is the minimum requirement for high-durability systems. (Clause 4.3 & Table 2).
What is a typical paint system for a heavy industrial area (C5-I)?+
A three-coat system such as a Zinc Silicate or Zinc Rich Epoxy Primer, an Epoxy MIO intermediate coat, and a Polyurethane top coat, with a total DFT of around 320 microns. (Table 2).
What does corrosivity category C4 mean?+
C4 corresponds to a 'High' corrosivity environment, typical of industrial areas and coastal areas with moderate salinity. (Table 1).
How is paint thickness measured on site?+
Using a calibrated non-destructive Dry Film Thickness (DFT) gauge. The frequency and acceptance criteria for measurements are detailed in Annex C.