Materials

How to stop structural steel rusting: ISO 12944 environments, blast cleaning, paint systems, hot-dip galvanizing, duplex and thermal spray coatings compared.

Yes, you can paint galvanized steel. Learn the three surface conditions, how to clean and profile the zinc, and which paints stick and which ones peel off.

Galvanized vs stainless steel: how each resists rust, 304 vs 316, a side-by-side comparison, which to choose, and why mixing the two can corrode the zinc.

What mill scale is, why paint fails over it, and how it is removed: blast cleaning grades Sa 2.5 and SP 10, pickling, grinding and when to leave it alone.

Hot rolled vs cold rolled steel compared: how each is made, surface, tolerance, strength and cost, the ASTM specs behind them, and which to buy for your job.

How intumescent paint protects structural steel: the four-part chemistry, thin vs thick film, the W/D section factor that sets thickness, and why no generic chart exists.

Tensile strength is the peak stress steel takes before it breaks. See values for A36, A992 and A572, how it differs from yield, and how ASTM E8 tests it.

How weathering steel forms its protective patina, the exposures FHWA says to avoid, the detailing rules that come with it, and how it compares to galvanizing.

Steel decking spans, forms the slab and acts as a diaphragm. Roof deck vs form deck vs composite deck, what B deck means, and why the gauge runs backwards.

Galvanized steel does corrode, but the zinc coating goes first and far slower than bare steel. How barrier, sacrificial and patina protection actually work.