1假如加热时工件外表附着油。而且会产生渗碳。氧化皮下基体金属被渗碳的局部将严重地受到酸的侵蚀。重油烧嘴最初燃烧时所喷出的油滴，若附着在工件上，影响也很大。操作大员的指纹附着在工件上时也会有影响。
1 if the attached oil heating workpiece appearance. And will produce carburizing. Subcutaneous matrix metal oxide by carburizing local will severely eroded by acids. The initial burning of heavy oil burner jet of oil droplets, if attached to the workpiece, the influence is very big also. Operating official's fingerprint adhesion when also can have influence on the artifact.
2假如工件外表有杂物。加热当然会对氧化皮有影响。
2 if the workpiece appearance with sundry. Heating, of course, will have an impact on the scale.
加热时必需使处置件不直接接触火焰口。
Heat necessary to the disposal of a mouth don't direct contact with the flame.
3气休或油的火焰直接接触的不锈钢外表和没接触的地方所产生的氧化皮有差异。所以。
3 gas or oil 'direct flame contact stainless steel produced by appearance and no contact with the local scale. So.
加热后有氧化皮残存的部位和没有氧化皮的部位，
After heating scale residual parts and not the part of the scale,
4如果处置件的局部在热处置前有残存的氧化皮。会出现氧化皮的厚度和成分上的差别，引起酸洗后外表不均匀，所以不只要注意最终的热处理，而且也要充分注意中间热处置和酸洗。

4 if the disposal of a local have residual scale before heat treatment. There will be differences in thickness and composition of scale, cause uneven appearance after pickling, so don't just pay attention to the final heat treatment, but also to fully pay attention to the intermediate heat treatment and pickling.
5外表光洁度不同时的影响
5 appearance bright and clean degree is not at the same time
即使同样加热，   如果外表光洁度不同。其外表粗糙处和精细处的氧化皮也不相同。例如，局部缺陷经过清理的地方和没清理的地方，形成氧化皮的状况不同，故引起酸洗后工件外表不均匀。
Even if the same heat, if the appearance bright and clean degree is different. The appearance of coarse and fine place scale is not the same. Local defects, for example, after a clean place and not clear place, forming oxide skin condition is different, so causes uneven appearance of workpiece after acid pickling.
6炉内气氛的差别
The difference between 6 in furnace atmosphere
氧化皮的形成一也会有变化，   炉内气氛在各局部的不同。这也是造成酸洗后不均匀的原因。所以，加热时，炉内各部位的气氛必需相同。为此，也必需考虑气氛的循环
To form a scale will also have change, furnace atmosphere in each local differences. This is also the cause of uneven after pickling. When heated, so that each part of the furnace atmosphere must be the same. Therefore, also must consider circulation of atmosphere

 
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