What a coating inspector checks before, during and after application on steel and concrete: ambient conditions and dew point, surface preparation, wet and dry film thickness, cure, pull-off adhesion, holiday testing, records and inspector qualifications.
An owner-level checklist for a protective coating specification on concrete or steel: service conditions, substrate, preparation, coating system, thickness, inspection and hold points, records, warranty and maintenance.
Penetrating water repellents (silanes and siloxanes) vs film-forming anti-carbonation coatings for concrete: how each works, what it protects against, breathability, where each fits, testing and limits.
Diagnosing protective coating failures on concrete and steel: blisters, pinholes and outgassing, delamination, cracking, underfilm corrosion and chalking, with likely causes, what to inspect and how to avoid a repeat.
Why some coatings yellow, darken or chalk in sunlight while others keep their color, what aromatic and aliphatic mean in plain terms, when the change matters and how topcoats protect UV-sensitive systems.
Why moisture in concrete causes coating and membrane failures, how the common tests work (RH probes, calcium chloride kits, plastic sheet tests, meters), when to test and what to do if a slab is still too wet.
How steel is prepared for protective coatings: ISO 8501-1 and AMPP/SSPC cleanliness grades, measuring surface profile, soluble salts and dust, flash rust, and why edges and welds need extra attention.
What the ICRI concrete surface profiles CSP 1 to 10 mean, which preparation methods produce them, how to match profile to coating thickness, how to deal with contamination and how pull-off tests confirm the surface is ready.
Polyurea in plain terms: how isocyanate and amine react, pure vs hybrid systems, plural-component spray rigs, fast-set pros and cons, typical uses, limits and how it differs from polyurethane.
How epoxy, polyurethane, polyurea, acrylic and cementitious coatings compare on concrete and steel, and how to choose by exposure, substrate, cure window, chemical resistance and crack bridging.