Secondary spreading of acidified sodium chloride (NaCl) aerosol droplets on the surface of zinc have been studied. The in-situ observation of the secondary spreading, corrosion morphology, corrosion products under different position and volume loss are used to understand the secondary spreading of the acidified aerosol. The results reveal that the secondary spreading effect of NaCl aerosol droplet is more pronounced compared to the acidified aerosol droplets which are mainly embodied in larger spreading region and faster spreading rate. The difference of the secondary spreading effect is associated with acidification which inhibits the increase in the pH at the periphery. Furthermore, lower corrosion rate was observed for the acidified aerosol droplets due to smaller secondary spreading area (cathodic region). The main corrosion product in the center of NaCl aerosol droplet and the aerosol droplet acidified by HCl is Simonkolleite, while for the aerosol droplet acidified by H₂SO₄ which shows several different corrosion morphologies in the center, the main corrosion products are Gordaite, Simonkolleite and Zn₄Cl₂(OH)₄SO₄ ∙ 5H₂O. The formation of protective corrosion products Gordaite that can inhibit the anodic reaction leads to the smallest spreading area and the lowest corrosion rate for the aerosol droplet acidified by H₂SO₄.

研究了酸化氯化钠（NaCl）气溶胶液滴在锌表面的二次扩散。通过对二次扩散的现场观察，腐蚀形态，不同位置和体积损失下的腐蚀产物，来了解酸化气溶胶的二次扩散。结果表明，与酸化的气溶胶液滴相比，NaCl气溶胶液滴的二次扩散效果更加明显，而酸化的气溶胶液滴主要表现在更大的扩散区域和更快的扩散速度上。二次扩散效果的差异与酸化有关，酸化抑制了周围pH的增加。此外，由于较小的二次扩散面积（阴极区域），观察到酸化的气溶胶液滴的腐蚀速率较低。₂ SO ₄，其示出了在中心几个不同的腐蚀形态，主要腐蚀产物Gordaite，Simonkolleite和Zn ₄氯₂（OH）₄ SO ₄ ∙5H ₂保护腐蚀产物Gordaite的O.形成可以抑制阳极反应导致H ₂ SO ₄酸化的气溶胶液滴的扩散面积最小，腐蚀速率最低。