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Hatari
Degreasing and Pickling: Alkali Takes the Oil, Acid Takes the Oxide
Two soils, two chemistries, and they do not substitute for each other.
**Alkali removes oil and grease**, by saponifying it or by emulsifying it. **Acid removes oxide and scale**, by dissolving it. An acid bath will not touch grease, and an alkaline bath will not touch oxide — so both are needed, in that order, and a rinse between them.
This rung is hazard-gated because it is the only part of plating that involves hot concentrated alkali and strong acids, and because the two together produce the situations that cause real injuries: splashing, hydrogen, and mixing what should not be mixed.
Juu
3 hours
Maudhui hatari
Blueprint hii ina taratibu za hatari. Ingia na uwashe maudhui ya hatari katika mipangilio ya akaunti yako ili kuona maagizo ya hatua kwa hatua.
IngiaBlueprint zinazohusiana
Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni
CC0 Umma Wote
Mchoro huu umetolewa chini ya CC0. Uko huru kunakili, kubadilisha, kusambaza, na kutumia kazi hii kwa madhumuni yoyote, bila kuomba ruhusa.
Saidia Mtengenezaji kwa kununua bidhaa kupitia Mchoro wao ambapo wanapata Kamisheni ya Mtengenezaji iliyowekwa na Wachuuzi, au unda marudio mapya ya Mchoro huu na uiunganishe kama kiungo katika Mchoro wako kuchangia mapato.