Unlock instant, AI-driven research and patent intelligence for your innovation.
Processes and compositions for improving corrosion performance of zirconium oxide pretreated zinc surfaces
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A composition, technology of zinc surface, applied in multi-step coating method and bath composition used therein, in the field of cyclic corrosion, can solve the problems of inability to provide, good corrosion resistance, inability to provide metal objects and the like
Pending Publication Date: 2018-08-07
HENKEL KGAA
View PDF4 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0006] The problem with current zirconia conversion coating processes is that in certain environments and on certain substrates they do not provide as good corrosion protection as conventional zinc phosphate methods
[0007] A particular problem is that existing methods of zirconia conversion coatings for zinc-containing substrates, especially HDG and EG, do not provide coated metal objects that meet certain automotive test requirements
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0083] Test methods include:
[0084] Method 1 Bonderite 958 (commercially available zinc phosphate: control)
[0085] Method 2 TD-1323-HB / HC standard method (control)
[0086] Method 3 Alkaline Co / Fe pre-cleaner + TD-1323-HB / HC
[0087] Method 4 Fe-containing cleaner + TD-1323-HB / HC
[0088] Method 5 Contains Co / Fe detergent + TD-1323-HB / HC
[0089] *TD-1323-HB / HC is a commercially available zirconia pretreatment bath.
[0090] Standard (12"x4") test panels were obtained from ACT Laboratories, Hillsdale, Michigan USA; cold rolled steel (CRS), electrogalvanized steel (EG), aluminum 6111 (AL6111), hot dip galvanized steel (HDG). Samples of each of the four substrates were processed according to one of the following methods. The method steps used to test the pre-cleaner are as follows:
[0093] 2. Wash with warm water - 30 seconds (spray)
[0094] 3. Fixodine Z8-30 seconds (...
Embodiment 2
[0122] Several proposed alkaline pre-cleaner formulations were tested. The concentrate formulation is shown in Table 3 below.
[0123] table 3
[0124]
[0125] Formulations 1A, 2A, 4A, and 5A used Co and Fe, and Formulations 3A and 6A used Fe only. Formulations 4A-6A used added silicate and Formulations 1A-6A contained no phosphate. Formulations 1A and 2A were similar to Formulations 4A and 5A, but with different levels of complexing agent.
[0126] Standard (12"x4") test panels were obtained from ACT Laboratories, Hillsdale, Michigan USA; cold rolled steel (CRS), electrogalvanized steel (EG), aluminum 6111 (AL6111), hot dip galvanized steel (HDG). The method steps are summarized in Table 5 below. For each concentration and time in Table 4, three panels of each of the four substrates were processed.
[0127] Table 4
[0128]
[0129] Table 5: Method steps:
[0130]
[0131] test panel using DuPont's VI electrophoretic coating (e-coat) performs wet-on-wet ele...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Login to View More
Abstract
A method of improving corrosion resistance of a metal substrate comprising a zinc surface coated with zirconiumoxideconversion coating by, prior to conversion coating, contacting the zinc surface with a composition comprising: a) iron(III) ions, b) a source of hydroxideion; c) at least one complexing agent selected from organic compounds which have at least one functional group -COOX, wherein Xrepresents either a H or an alkali and / or alkaline earth metal; d) 0.0 to about 4 g / 1 cobalt (II) ions; and optionally e) a source of silicate: wherein the composition has a pH of at least 10.
Description
[0001] This application is submitted on February 8, 2012 with the international application number WO2012 / 109339, the Chinese national application number 201280004419.3, and the title of the invention is "method and composition for improving the corrosion performance of zirconia pretreated zinc surfaces" A divisional application of an invention patent application. [0002] Cross References to Related Applications [0003] none. technical field [0004] The present invention relates to the improvement of the corrosion performance of zirconia conversion coatings deposited on zinc-containing surfaces by pre-treating the zinc-containing surfaces with a cobalt and / or iron-containing composition prior to contact with the zirconia that forms the conversion coating composition method. More specifically, the present invention relates to multi-step coating processes and bath compositions used therein which provide improved coating on zinc-containing surfaces such as hot-dip galvanize...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More