background elements industrial industry iron large metal old pile piled pipe pipelines pipes rust rusty steel textures big construction corrosion heavy huge nut nuts texture thread threads tool tools abstract blue diamond free image painted peeled photo plate stock weathered bridge decay grunge Portland rivet rivets Steel Bridge truss black burst chap crack fissure fracture oil paint pattern split tin tinware white autumn brown copper fall leaf leaves natural nature red russet tawny vine Vitis yellow agate brick cement Dirt dirty granite hard moss outdoor rock sand stone