Passivating agent for galvanized steel parts
A passivation treatment, steel parts technology, applied in the direction of metal material coating process, etc., can solve problems such as environmental pollution, achieve the effects of low concentration, prolonged corrosion resistance, and easy wastewater treatment
Active Publication Date: 2016-05-18
安徽华兴管业有限责任公司
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Problems solved by technology
The traditional passivating agent contains carcinogenic hexavalent chromium, which causes serious pollution to the environment, and is gradually replaced by the environmentally friendly trivalent chromium passivating agent
Method used
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Embodiment 1
[0013] A passivation treatment agent for galvanized iron and steel parts, consisting of the following components in mass percentage:
[0014]
Embodiment 2
[0016] A passivation treatment agent for galvanized iron and steel parts, consisting of the following components in mass percentage:
[0017]
[0018]
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The invention discloses a passivation treatment agent for galvanized steel components, which relates to the field of chemical technologies. The passivation treatment agent consists of the following compositions in percentage by mass: 4-8% of corn starch, 10-20% of tert butanol, 50-60% of chromic nitrate, 10-20% of cinnamic acid, 10-20% of a stearic acid, 1-6% strontium nitrate, and 1-3% of sodium carbonate. The passivation treatment agent disclosed by the invention is long in use cycle, excludes hexavalent chromium, is easily applied to wastewater treatment, and also does not contain hydrogen peroxide or other strong oxidizers, and therefore, the passivation treatment agent is an environment-friendly passivator; the passivation treatment agent is low in concentration, low in production cost, and more economical and practical, and can enhance the salt fog resistance and corrosion resistance of a metal surface and prolong the service life of the metal surface.
Description
technical field [0001] The invention relates to the technical field of chemical industry, in particular to a passivation treatment agent for galvanized iron and steel parts. Background technique [0002] Steel parts are usually passivated after electro-galvanizing or hot-dip galvanizing to prevent white rust in a short time. Since the galvanized layer is prone to white rust in a humid environment, which seriously affects the appearance and service life, steel parts usually need passivation treatment after galvanizing. The traditional passivating agent contains carcinogenic hexavalent chromium, causing serious pollution to the environment, and is gradually being replaced by the environmentally friendly trivalent chromium passivating agent. The early trivalent chromium passivation agent was made of chromic acid (CrO 3 ) and reducing agent (such as potassium pyrosulfite) reaction. Contents of the invention [0003] The technical problem to be solved by the present inventio...
Claims
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IPC IPC(8): C23C22/53
Inventor 张福友
Owner 安徽华兴管业有限责任公司