AS 3894.6-2002 (2013) PDF

Full title and description

AS 3894.6-2002 (R2013) — Site testing of protective coatings. Method 6: Determination of residual contaminants. Practical field test procedures for detecting residual surface contaminants that can affect the performance of protective coatings on metal substrates.

Abstract

This Standard specifies straightforward, on-site test methods for detecting common residual contaminants on surfaces prior to coating application. It defines five field test methods (Methods A–E) for the presence of chloride salts, oil and water deposits, residual dust, soluble ferrous salts and mill scale. The procedures are intended to help inspectors, applicators and specifiers assess surface cleanliness quickly and consistently, and to support decisions on whether additional surface preparation is required before coating.

General information

• Status: Current (reconfirmed — R2013).
• Publication date: 7 June 2002 (reconfirmation approved 25 September 2013).
• Publisher: Standards Australia.
• ICS / categories: 25.220.01 — Surface treatment and coating in general.
• Edition / version: 1st edition (AS 3894.6-2002), reconfirmed R2013.
• Number of pages: 9 (concise method standard).

Scope

Provides practical test procedures for on-site determination of residual contaminants on prepared substrates prior to coating. Specifically it covers: Method A — detection of chlorides; Method B — detection of oil and water deposits; Method C — detection of residual dust; Method D — detection of soluble ferrous salts; and Method E — detection of mill scale. The Standard is intended for field use where laboratory analysis is impractical and to inform immediate surface-preparation and coating decisions.

Key topics and requirements

• Method A — field detection procedure for chloride contamination on surfaces prior to coating.
• Method B — simple on-site tests for oil and water deposits that may interfere with coating adhesion.
• Method C — assessment technique for residual dust on prepared surfaces.
• Method D — procedure for detecting soluble ferrous salts (a corrosion-related contaminant).
• Method E — identification of mill scale remaining on the substrate after preparation.
• Guidance on interpretation of test results and when further surface preparation or laboratory analysis is recommended.
• References to related surface-preparation and sampling standards used to support sampling, inspection and acceptance decisions.

Typical use and users

Used by coating inspectors, quality assurance/quality control personnel, corrosion engineers, applicators/contractors, specifiers and asset owners/managers. Typical applications include pre-coating inspection of structural steel, pipelines, industrial plant, bridges and other metallic assets where residual contaminants can affect coating performance. The methods are intended for on-site, rapid evaluation to support immediate corrective actions or further testing.

Related standards

Commonly referenced and related documents include AS/NZS 3894 series (other site testing methods), AS 1199 (sampling procedures), AS 1627 series (surface preparation and cleaning methods), AS/NZS 2310 (glossary of paint and painting terms) and other standards governing surface preparation and coating application. AS 3894.6-2002 was developed to supersede the earlier joint AS/NZS 3894.6:1996 and is cited by later standards addressing steelwork and coating acceptance criteria.

Keywords

site testing, protective coatings, residual contaminants, chlorides, oil deposits, water deposits, dust, soluble ferrous salts, mill scale, surface cleanliness, field test methods, coating inspection

FAQ

Q: What is this standard?

A: AS 3894.6-2002 (R2013) is an Australian Standard that specifies simple on-site test methods (Methods A–E) for detecting residual contaminants on surfaces prior to the application of protective coatings.

Q: What does it cover?

A: It covers practical field procedures to detect chlorides, oil and water deposits, residual dust, soluble ferrous salts and mill scale, and gives guidance on interpreting results and deciding when further preparation or laboratory testing is needed.

Q: Who typically uses it?

A: Coating inspectors, contractors and applicators, corrosion engineers, specifiers, QA/QC personnel and asset owners who need rapid, on-site assessment of surface cleanliness before coating works.

Q: Is it current or superseded?

A: The standard was published 7 June 2002 and was formally reconfirmed (R2013). As reconfirmed in 2013 it remained valid; users should verify the current status with Standards Australia or their standards provider to confirm there has been no subsequent revision or withdrawal since the reconfirmation.

Q: Is it part of a series?

A: Yes — it is part of the AS/AS‑NZ 3894 series of site testing methods for protective coatings (other methods in the series cover surface profile, soluble salts, etc.).

Q: What are the key keywords?

A: Residual contaminants, site testing, protective coatings, chlorides, oil, water, dust, soluble ferrous salts, mill scale, surface cleanliness.