【摘要】 测量了不同极化电位下， Ｈ６２黄铜在氨水溶液腐蚀过程中表面脱 Ｚｎ疏松层引起的拉应力，并用单边缺口试样测量了不同极化电位下的应力腐蚀敏感性，结果表明：黄铜在氨水中自然腐蚀时，在脱Ｚｎ层界面会产生很大的拉应力，整个试样的平均应力为 σ＝１８．１ＭＰａ ；阳极极化使表层拉应力略有下降，阴极极化则使疏松层引起的拉应力急剧下降乃至为零，阴极极化在表层产生镀Ｃｕ层后出现压应力；应力腐蚀敏感性随外加电位的变化规律和疏松层引起附加拉应力的变化完全一致。更多还原

【Abstract】 Brass foil with a protective layer formed on one side was deflected during corrosion in an ammonia solution at various applied potentials, and then corrosion-induced stress generated at brass/dezincification layer at different potentials could be measured. At the same time, susceptibility to stress corrosion cracking (SCC) of brass in the ammonia solution at various applied potentials was measured using a single-edge notched specimen. A tensile stress will be generated at the metal/dezincification layer interface during original corrosion for brass in an ammonia solution. The average stress of whole specimen is 18.1 MPa. Dezincification layer-induced tensile stress decreased slightly under anodic polarization, but reduced steeply with the increase in potential of cathodic polarization. At the cathodic potelltials, corrosion-induced stress became compressive because of copperplating layer. Therefore, the variation of SCC susceptibility with potential is consistent with that of the corrosion-induced additive stress.更多还原