CoatingsPro Magazine Supplements

STEEL 2019

CoatingsPro offers an in-depth look at coatings based on case studies, successful business operation, new products, industry news, and the safe and profitable use of coatings and equipment.

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Page 21 of 27

22 STEEL SURFACES 2019 COATINGSPROMAG.COM non-conformance by visual examination alone, as these would be the areas that could have low material thickness with regard to conformance. In a similar way, a contrasting stripe coating color can help ensure compliance and ensure that the stripe coat is actually being applied. is may add a higher cost to the manufacturer and/or contractor, and it will certainly also create more onus for compliance, but it may be worth the discussion up front to ensure that the specified system is being delivered to the client. Caution: If you're using color as an inspection tool, you will need to verify with the coating manufacturer that the colors specified do cover or hide at the minimum specified thickness. is can be done by the coating manufacturer using drawdown cards with the specified colors applied to them. Depending on product formulation, a specified color may not hide at the specified thickness. Yellows and reds, in particular, are notorious for this. If the engineer specifies, for example, a gray primer with a safety yellow topcoat at 2–3 mils (3.2–4.8 microns), the yellow topcoat may not hide the gray primer at 3 mils (4.8 microns), and the engineer may receive a change order by the contractor. Color With limited personnel on projects with multiple tasks and locations, inspection time is limited. e simple use of color can act as an inspection assistant to help determine that the correct coating thicknesses were applied in those random areas. is can be an option to help an owner get what was specified. It is not foolproof, nor is it by any means a substi- tution for a full-time coatings inspector, but it can assist a project in getting closer to the quality specified regarding dry film thickness. CP David Hunter is a civ i l eng ineer w it h 20+ years' domest ic and inter nat iona l e x per ience in cor rosion cont rol. He is t he coat ings prog ram manager at Pond & Company. Hunter hold s cer t if icat ions as a NACE 3 Coat ing Inspector, SSPC Level 2 Coat ings Inspector, NACE Of fshore Cor rosion A ssessment Technician, and NACE Cat hod ic Protect ion Technician. He is a lso an inst r uctor for NACE and SSPC and has been teaching c lasses for more t han 10 years and in 16 count r ies across bot h prog rams. For more infor mat ion, contact: Dav id Hunter, (832) 863-6039, Inspector's Assistant

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