Zinc plating versus galvanising: tolerance consequences
Zinc plating versus galvanising by coating mass, corrosion life and the dimensional change each one forces on holes, threads and thin panels.
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Topic hub · 28 guides
Surface treatment and powder coating
Coating failures are rarely the powder's fault. They are usually a cleaning, rinsing or conversion problem that happened before the part reached the booth. Ganesh runs seven-tank pretreatment, a 16 ft by 16 ft shot blast chamber, an 18 ft by 14 ft powder booth, a wet paint booth and a curing oven in-house. These guides cover each tank, degreasing by substrate, phosphating, powder versus wet paint, DFT and adhesion testing, and diagnosing blistering, pinholes and creeping corrosion.
Guides in this topic, page 3
Seven-tank pretreatment, phosphating, shot blasting, powder and wet paint selection, film thickness and the failure modes that show up two monsoons later.
Degreasing brass parts before coating
Brass holds 0.5–2 g/m² of drawing oil and forms no phosphate, so degreasing brass parts decides whether the powder stays on. Baths, rinse limits and DFT.
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Powder colour consistency: design, failure modes and the fix
Colour drift on a powder line comes from batch, film build and cure, not the gun. How to hold ΔE 1.0 and what to put on the drawing.
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Powder coating aluminium parts: finish and adhesion
Alloy, temper, pretreatment, film build and cure temperature decide whether powder coating aluminium parts survives a monsoon or blisters in a year.
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Paint line part hanging: design, failure modes and the fix
How a part hangs decides coverage, drainage and cure. The angles, hole sizes and load rules that stop runs, bare corners and undercured parts.
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Powder booth maintenance: recovery, filters and colour change
Powder booth maintenance that keeps film build stable: face velocity, filter differential pressure, recovery ratio, colour-change sequence and the defects each one prevents.
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Paint adhesion after welding: why the weld zone fails first
A weld toe that passes on the flat and fails at G3 in the cross-cut. What welding leaves behind, why alkaline cleaning cannot remove it, and the prep that can.
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Phosphating and conversion coatings for steel
Phosphating and conversion coatings for steel: iron versus zinc phosphate, coating weight in g/m², rinse quality and the checks that predict powder coating failure.
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Degreasing electrical enclosures before coating
Degreasing electrical enclosures before coating: mill oil, press lubricant and laser oxide, the seven-tank route, drain holes and the adhesion checks that hold.
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