TECHNOLOGY FOCUS - METALLURGY - Preferred Components: A layer comprising iron or iron alloy is between the outer surface of the clad layer and the layer of iron-X alloy. A bonding layer comprising zinc or tin is between the outer surface of the clad layer and the layer comprising iron or iron alloy. Preferred Dimensions: The layer comprising iron-X alloy has a thickness of not more than 1.8 (preferably 0.10-1.0) microns. The layer comprising iron or iron alloy has a thickness of not more than 2.0 (preferably 0.05-0.5) microns. The bonding layer has a thickness of not more than 1.0 (preferably 0.01-0.15) microns.    TECHNOLOGY FOCUS - METALLURGY - Preferred Composition: The mole ratio of iron:X is 10:(0.5 - less than 5). The layer comprising iron or iron alloy comprises at least 80 (preferably at least 98) wt.% iron. The iron-X layer and the layer comprising iron or iron alloy are lead-free. The clad layer and all exterior layers have a composition comprising 5-14 wt.% silicon; 0.15-8 wt.% iron; 0.01-7 wt.% X, preferably tin, zinc, manganese, or copper; up to 0.3 wt.% tin, zinc, manganese, or copper, if not present as X; optionally up to 0.3 wt.% bismuth, antimony, indium, and/or lead; up to 0.1 wt.% titanium; up to 0.1 wt.% strontium; up to 5 wt.% magnesium; aluminum and inevitable impurities.Preferred Method: The layer comprising the iron-X alloy is formed by a plating method, electrolytic plating method, physical vapor deposition (PVD) method, or thermal spraying method. The assembly of components is brazed under a vacuum or in an inert atmosphere in the absence of a brazing-flux material.Preferred Materials: The core metal sheet comprises steel. aluminized steel, stainless steel, plated or coated stainless steel, bronze, brass, nickel, nickel alloy, titanium, or plated or coated titanium. It comprises an aluminum alloy, preferably AA3xxx, AA5xxx or AA6xxx-series aluminum alloy.    TECHNOLOGY FOCUS - INDUSTRIAL STANDARDS - Preferred Property: The brazing sheet product has an improved post-braze corrosion resistance as compared to nickel-plated brazing sheet products when measured in a SWAAT test in accordance with ASTM G-85.