PATENT CLAIM ANALYSIS

Application Number: 16234025
Application Type: Utility
Filing Date: 2018-12
Publication Date: 2019-05
Patent Classification: ["427", "446000"]

Abstract:
Provided are a high temperature and chloride corrosion resistant NiCrTiAlSi/La2O3 coating at a flue gas side of a waste incineration power generating boiler and a preparation method thereof. The method comprises the following steps: (1) preparing a composite powder; (2) uniformly grinding the composite powder to obtain a spherical composite powder, then drying the spherical composite powder; (3) cleaning and roughening a surface of a substrate; (4) using a thermal spraying technique to spray a primer layer on a heating surface; (5) using a thermal spraying technique to spray the spherical composite powder onto the primer layer; and (6) cooling. The coating obtained by the method comprises a composite coating spray-coated on a surface of the primer layer. A rare element in the form of La 2 O 3  is added to the coating to purify a grain boundary of the coating. The method strengthens the grain boundary and promotes the formation of an oxide film to alter the morphology of the coating, refine a crystal grain, and improve a high temperature and corrosion resistance and oxidation resistance of the coating.

Claim (Index 1):
A method for preparing a high temperature chloride corrosion resistant NiCrTiAlSi/La 2 O 3  coating at a flue gas side of a waste incineration power generating boiler, comprising the following steps:\n (1) uniformly mixing Inconel625 alloy powder and NiCrTiAlSi/La 2 O 3  alloy powder in proportion of (85%-90%):(10%-15%) in mass percentage to obtain composite powder, wherein the NiCrTiAlSi/La 2 O 3  alloy powder is composed of following components in mass percentage: 80-85% of Ni, 5-8% of Cr, 3-8% of Ti, 3-8% of Al, 1-3% of Si and 2-4% of La 2 O; ( 2 ) grinding evenly the composite powder obtained in the step (1) to obtain spherical composite powder and drying the spherical composite powder; (3) cleaning and roughening a surface of a heating surface of a waste incinerator; (4) adopting a thermal spraying technique to spray a primer layer on the surface of the heating surface, wherein the primer layer is a NiAl alloy layer; (5) adopting a thermal spraying technique to spray the spherical composite powder obtained in the step (2) on the primer layer in the step (4); and (6) cooling to obtain a high temperature chloride corrosion resistant coating of the heating surface of the waste incinerator.

Metadata:
- Claim Count in Document: 11.0
- Percentile: 98.0
- Lexical Diversity: 2.20213
- Patent Class: 427.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15301718', '11686813', '12443690', '13977218', '11810210']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7763539761203471
- 35 USC 102 Novelty (BERT): 0.4914816840472455
- Combined Prediction Score: 0.747866746913037
- Mean Citation Score: 148.326886
- Max Citation Score: 153.08145
- Similarity Product: 96.22866943326294

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 0
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test