What other industry sectors might use zinc phosphate treatments?
The Oil & Gas industry and the Automotive industry also use this coating.
How long does the coating protect from corrosion with no post-treatment?
The bare coating, with no supplemental sealing or treatment, will not be corrosion resistant for very long on its own. From experience, flash rust appears on the surface in less than 12 hours.
What is the difference between fine-grain and heavy-grain?
Heavy-grain is a heavier or thicker coating and it is capable of retaining supplementary oils and waxes better than fine-grain. Fine-grain has a finer crystal structure that serves well for subsequent painting.
Can metals other than steel be zinc phosphate treated?
It is predominantly applied to steel as well as zinc surfaces and less commonly applied to other metals.