have stainless boiling pots made of cheap stainless steels. This corrision will happen if its chromium level is too low.
If you have a pot made of a premium food grade stainless steel, you won't see rusts as the "rust" (film - Chromium oxide) on stainless steel is clear and invisible.
are 304 stainless steel which is also called 18-8 stainless steel. It contains 18% Chromium and 8% Nickel. Some steel mills do cost reduction by reducing Chromium to lower specification allowed. Also, Chromium may be precipitated making them unevenly distributed. I have a new kitchen sink which rusts locally because of low Chromium content at those areas.
了好几个了。我以为是水垢，但水垢用醋应该能除掉，可是我用醋试过，没效果，感觉就是锈。问一下这种锈对身体有害吗？
have stainless boiling pots made of cheap stainless steels. This corrision will happen if its chromium level is too low.
If you have a pot made of a premium food grade stainless steel, you won't see rusts as the "rust" (film - Chromium oxide) on stainless steel is clear and invisible.
Best regards,
Alex
以前没用RO，会有水垢，但是也没见生锈。
我觉得不需要担心或买新的。
壶贵一点
https://www.amazon.com/BELLA-14745-Electric-Protection-Detachable/dp/B07HRTNQBM/ref=sr_1_5?keywords=Kettle%2Belectric&qid=1638476516&sr=8-5&th=1
刚查了下网，似乎316更好。水壶需要耐高温，保温瓶不需要。另外材质也可能不同。便宜的不锈钢国内称为不锈铁，吸铁石可以吸住，314/316应该吸不住。
are 304 stainless steel which is also called 18-8 stainless steel. It contains 18% Chromium and 8% Nickel. Some steel mills do cost reduction by reducing Chromium to lower specification allowed. Also, Chromium may be precipitated making them unevenly distributed. I have a new kitchen sink which rusts locally because of low Chromium content at those areas.
Best regards,
Alex