Metal heat treating services by means of a thermal and chemical process that improves the corrosion resistance and changes the surface of various metals into a hard to remove black color of different shades; Metal refining services, namely, steel refining; Treatment of metal; Applying decorative and protective coatings to metal by means of galvanization

'appli':44 'black':30 'chang':19 'chemic':11 'coat':48 'color':31 'corros':16 'decor':45 'differ':33 'galvan':54 'hard':27 'heat':2 'improv':14 'mean':6,52 'metal':1,24,35,43,50 'name':38 'process':12 'protect':47 'refin':36,40 'remov':29 'resist':17 'servic':4,37 'shade':34 'steel':39 'surfac':21 'thermal':9 'treat':3 'treatment':41 'various':23

Applying protective coatings to metals; Metal alloy coating services

'alloy':7 'appli':1 'coat':3,8 'metal':5,6 'protect':2 'servic':9

NITRO BLACK

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