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The higher the demands to protection are, the more advanced will theCoating system and painting specification be. This, in turn, increases the demands to the execution of the work - consequently – to the degreeof quality control/ painting inspection

Level of Inspection

Three levels of inspection are cognized. British standard, BS 5493:1977, defines them as follows :-

1. Full:- All operations observed by an inspector and passedas complying with the specification before the next stage is started. ( for Larger projects, this may require a team of inspectors.

2. Intermittent :- Part of all operations observed by an inspector and passedas complying with the specification before the next stage is started. .

3. Occasional :- All operations observed initially by an inspector for settingstandards of workmanship. Ad hoc visits by an inspector thereafter.

Duties of the inspector :-

The duties of the paint coating inspector may be very briefly given as:-

- Spotting causes for possible later defects.- Ensure that said causes are removed, or the defects corrected

The multitude of tasks belonging to paint coatings inspection may be conveniently divided according to the progress of work. Five distinct phases – some of them recurrent – require the inspector’s attention.

1. Before surface preparationBefore the start of any surface preparation it would be advantageous to examine, at leastthe surface to be treated, preparation equipment, and possibly also structural details.

Surface condition (steel) – Important Check points :-- Rust grades (eg. A,B,C or D according to SIS 05 59 00: 1967- Laminations or inclusions- Presence of water, Oil, Grease, Soluble salts, soot or other contaminants not

removed by mechanical cleaning.- Sharp or rough edges.- Rough or porous welds, weld spatter, arc strikes, excessive weld fumes (usually greasy

etc.)

2. During Surface Preparation :-While surface preparation is in progress, relevant equipment checks are made at regular intervals.- Cleanness and- Profile/ Anchor patternare monitored to the extent this is possible.

3. Before paint application :-main areas, on which the inspector should focus his attention before any paint is applied, wouldinclude the storage, mixing and issue of paints, working conditions and application equipment,surface condition and the microclimate.

4. During paint application : -During the application of paints, most of the checkpoints from foregoing phase remain valid.in addition :- wet film thicknesses and- workmanshipare monitored to the extent possible.

5. After paint application:- Always checked, after application of the final coat of paint are

- General appearance and- Total dry film thickness appliedChecks may, in some cases and for particular jobs, be made on:- Continuity ( free from pinholes)- Adhesion / Cohesion- Smoothness ( this is sometimes desired on the

underwater hull of the ships

INSPECTION INSTRUMENT

Elcometer 125

ISO Surface Comparator

Shot & Grit Visual Assessment Tactile Assessment

( touch )

Comparators, for determining surface roughness and profile(anchor pattern)

Surface Preparation

INSPECTION INSTRUMENTSurface Preparation

Elcometer 122/124

Testex Tape & Dial Gauge

Different courses available

Replica of the profile Measure total thickness Subtract 50 microns (thickness of

hard plastic window) e.g. 125 micron total thickness = 75

micron peak-to-valley height

Surface Preparation

INSPECTION INSTRUMENT

Elcometer 127

Keane-Tator Surface Profile Comparator

Shot, Grit and Sand

Elcometer 129

Rubert Surface Comparator

○ Shot○ Grit

Rugotest Surface Comparator

○ Dual Rubert

Rugotest

INSPECTION INSTRUMENTSurface Preparation

Elcometer 123 Surface Profile Gauge

Take average of several readings Zero on Glass

INSPECTION INSTRUMENTSurface Preparation

Elcometer 224 Surface Profile Gauge

Take average of several readings Built in memory & averaging facility Digital Output Digital display with data summary Batch collection

INSPECTION INSTRUMENT

SALT DETECTION EQUIPMENT

Soluble Salts - The Problem Salt Detection Methods Salt Detection in Abrasives & Water

Apply patch Insert 3 ml of distilled water Pump liquid to release salts Extract solution Test solution with conductivity meter Available as a kit

Bresle Patch (Elcometer 135/B)

Elcometer 130 (SCM400)

Wet filter paper with 1.6 ml water Place paper on test site / surface for 2 min. Place paper on electrode & close lid Display shows salt level in µg/cm²

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